Unit d review
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The document discusses the six types of simple machines: levers, screws, wedges, ramps, wheels and axles, and pulleys. It explains how fulcrums are used in levers and describes mechanical advantage and efficiency. Compound machines, gears, and work are also defined. Hydraulics and pneumatics are mentioned as using pressure from liquids and gases, respectively, to lift objects.
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Simple Machines2008
Simple machines make work easier by changing either the size, direction, or amount of force needed. The six simple machines are the inclined plane, wedge, lever, wheel and axle, screw, and pulley. Machines provide mechanical advantage by multiplying the output force compared to the input force. However, machines are never 100% efficient due to energy lost from friction.
Mechanical advantage and efficiency
Mechanical advantage is a measure of the ability of a machine to multiply the input force. It is calculated as the ratio of the output force to the input force. Machines can increase force, distance, or change the direction of force. The efficiency of a machine compares the output work to the input work, taking into account energy lost to friction. No real machine has 100% efficiency, as some work is always lost to friction.
Physics Science: Machines and Efficiency
Machines convert input work into more useful output work by changing the force, distance, or direction of the input work. The output work is always less than the input work due to friction losses. A machine's efficiency is calculated as the ratio of output work to input work. For example, a crate was dragged up a 20m ramp with an input force of 100N over 20m for an input work of 2000N-m. The output work was 1500N-m with a force of 300N over 5m. The machine's efficiency was calculated as 1500/2000 x 100 = 75%.
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Machines make work easier by changing the size, direction, or distance over which a force acts. The work input to a machine is the input force multiplied by the input distance, while the work output is the output force multiplied by the output distance. The actual mechanical advantage of a machine is calculated as the output force divided by the input force, while the ideal mechanical advantage considers the input and output distances without friction. The efficiency of a machine is always less than 100% due to friction converting some of the work input into heat rather than work output.
Ch14.3 powerpoint
The document discusses mechanical advantage and efficiency of machines. It defines ideal mechanical advantage (IMA) as the mechanical advantage in the absence of friction, and actual mechanical advantage (AMA) as the mechanical advantage determined by actual input and output forces. It states that the AMA is always less than the IMA due to friction. Examples of calculating IMA using input and output distances are provided. Efficiency is discussed as the percentage of input work that becomes output work, and is always less than 100% due to friction losses.
Kinetics of a particle
A driver traveling at 100 km/h sees an obstacle and locks the brakes after 0.75 seconds, skidding to a stop after traveling 170 meters. Using the kinematic equations and the force of friction equaling mass times acceleration, the coefficient of kinetic friction between the tires and road is calculated to be 0.23.
Simple Machines
The document discusses different types of simple machines and how they work. It defines simple machines as devices that make work easier by changing either the amount of force needed, the distance over which force is applied, or the direction of the applied force. It then provides examples and descriptions of six simple machines: levers, inclined planes, pulleys, wedges, screws, and wheel and axle. For each machine it explains how it functions to reduce the amount of force required.
Work and power
This document defines and explains key concepts related to work, power, and machines. It discusses that work is done when a force causes an object to move, and is calculated as force multiplied by distance. Power is defined as the rate of doing work, or work divided by time. Various types of simple machines are described, including levers, pulleys, wheels and axles, inclined planes, screws, and wedges. Formulas for calculating mechanical advantage and efficiency are provided. Examples of calculating work, power, mechanical advantage, and efficiency in various scenarios are also included.
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Simple Machines2008
Simple machines make work easier by changing either the size, direction, or amount of force needed. The six simple machines are the inclined plane, wedge, lever, wheel and axle, screw, and pulley. Machines provide mechanical advantage by multiplying the output force compared to the input force. However, machines are never 100% efficient due to energy lost from friction.
Mechanical advantage and efficiency
Mechanical advantage is a measure of the ability of a machine to multiply the input force. It is calculated as the ratio of the output force to the input force. Machines can increase force, distance, or change the direction of force. The efficiency of a machine compares the output work to the input work, taking into account energy lost to friction. No real machine has 100% efficiency, as some work is always lost to friction.
Physics Science: Machines and Efficiency
Machines convert input work into more useful output work by changing the force, distance, or direction of the input work. The output work is always less than the input work due to friction losses. A machine's efficiency is calculated as the ratio of output work to input work. For example, a crate was dragged up a 20m ramp with an input force of 100N over 20m for an input work of 2000N-m. The output work was 1500N-m with a force of 300N over 5m. The machine's efficiency was calculated as 1500/2000 x 100 = 75%.
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Machines make work easier by changing the size, direction, or distance over which a force acts. The work input to a machine is the input force multiplied by the input distance, while the work output is the output force multiplied by the output distance. The actual mechanical advantage of a machine is calculated as the output force divided by the input force, while the ideal mechanical advantage considers the input and output distances without friction. The efficiency of a machine is always less than 100% due to friction converting some of the work input into heat rather than work output.
Ch14.3 powerpoint
The document discusses mechanical advantage and efficiency of machines. It defines ideal mechanical advantage (IMA) as the mechanical advantage in the absence of friction, and actual mechanical advantage (AMA) as the mechanical advantage determined by actual input and output forces. It states that the AMA is always less than the IMA due to friction. Examples of calculating IMA using input and output distances are provided. Efficiency is discussed as the percentage of input work that becomes output work, and is always less than 100% due to friction losses.
Kinetics of a particle
A driver traveling at 100 km/h sees an obstacle and locks the brakes after 0.75 seconds, skidding to a stop after traveling 170 meters. Using the kinematic equations and the force of friction equaling mass times acceleration, the coefficient of kinetic friction between the tires and road is calculated to be 0.23.
Simple Machines
The document discusses different types of simple machines and how they work. It defines simple machines as devices that make work easier by changing either the amount of force needed, the distance over which force is applied, or the direction of the applied force. It then provides examples and descriptions of six simple machines: levers, inclined planes, pulleys, wedges, screws, and wheel and axle. For each machine it explains how it functions to reduce the amount of force required.
Work and power
This document defines and explains key concepts related to work, power, and machines. It discusses that work is done when a force causes an object to move, and is calculated as force multiplied by distance. Power is defined as the rate of doing work, or work divided by time. Various types of simple machines are described, including levers, pulleys, wheels and axles, inclined planes, screws, and wedges. Formulas for calculating mechanical advantage and efficiency are provided. Examples of calculating work, power, mechanical advantage, and efficiency in various scenarios are also included.
Work And Simple Machines
Work is defined as a force applied to an object, moving it a distance. Simple machines like levers, pulleys, and inclined planes make work easier by multiplying applied forces or distances moved. They provide mechanical advantages but also lose efficiency due to friction. Common simple machines are described along with their applications, mechanical advantages, and efficiency considerations.
Mechanical Advantage Of Machines
Mechanical advantage refers to the number of times a machine multiplies force. There are two types: theoretical mechanical advantage (TMA), which considers distances moved; and actual mechanical advantage (AMA), which considers applied and produced forces. Efficiency is the ratio of output work to input work, and is less than 100% due to friction converting some input work to heat. Sample problems demonstrate calculating TMA, AMA, efficiency, effort, and work input using relevant equations.
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This document provides an overview of simple machines, including definitions and examples. It discusses how simple machines can change the direction or magnitude of a force but cannot create energy. While simple machines reduce the amount of force needed to do work, the distance of movement is also reduced. The mechanical advantage of a machine is the ratio between the input and output forces or distances, with ideal machines matching the input and output distances. Examples are provided to demonstrate calculating work, power, efficiency and mechanical advantage.
Design and Construction of A Can Crusher Machine
1) The document describes the design and construction of a can crusher machine by a student at Khulna University of Engineering & Technology.
2) The objectives of the project were to study different can crusher machines, familiarize with the parts, and construct a machine to better recycle cans.
3) The design is based on a slide crank mechanism that converts rotational motion to linear motion through a connecting rod and ram to dynamically crush cans.
Simple Machines
The document discusses machines and the six simple machines: inclined planes, wedges, screws, levers, wheels and axles, and pulleys. It defines a machine as a device that makes work easier by changing the force, distance, or direction of force needed. Machines provide mechanical advantage by increasing output force over input force. Efficiency compares output work to input work and is reduced by friction. The document provides examples and formulas for calculating mechanical advantage of each simple machine.
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This document discusses simple machines and their uses. It defines six types of simple machines: lever, pulley, wheel and axle, inclined plane, screw, and wedge. For each machine it explains how it works and provides examples. It also covers concepts like work, energy, power, mechanical advantage, efficiency, and how machines conserve energy. Simple machines allow us to do work more easily by reducing the amount of force needed.
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Simple machines
This document provides notes on simple machines that are not included in the textbook. It defines a simple machine as a device that makes work easier using minimal moving parts, often through human power. Examples given are inclined planes and pulleys. Simple machines allow a smaller force to be applied over a greater distance to do the same amount of work. They multiply the input force but do not reduce the total work. Mechanical advantage is the ratio of output to input force, while efficiency accounts for real-world friction. Formulas are provided for calculating work input and output, as well as mechanical advantage and efficiency of inclined planes and pulleys. A sample problem is worked through as an example.
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The document discusses work, power, and simple machines. It defines work as the movement of an object by force, measured in foot-pounds or joules. Power is defined as the rate of work over time. It then discusses the six simple machines: lever, wheel and axle, pulley, inclined plane, wedge, and screw. Levers in particular are described as multiplying force or speed with or without changing the direction of effort, consisting of a rigid bar and fulcrum.
Mfe chapter 4 notes
This document discusses work, power, simple machines, and compound machines. It defines work as a force acting through a distance, and power as the rate at which work is done. Six simple machines are described: inclined planes, wedges, screws, levers, pulleys, and wheels and axles. Compound machines combine two or more simple machines to make work easier by changing the input force, distance, or direction of force. The mechanical advantage of machines allows work to be done with less input force.
1 why we use machines
We use machines to make work easier by multiplying the effort force applied. There are two types of work - work input is the work done on the machine, while work output is the work done by the machine. An ideal machine's work input equals its work output. Mechanical advantage is how much a machine multiplies the effort force, making work easier, and is calculated by dividing the resistance force by the effort force. Different simple machines have different mechanical advantage formulas.
Work and machines
1) A lever is a simple machine that uses a bar to change the direction or magnitude of a force. It has three main parts: the fulcrum (point of support), the effort force (input force), and the resistance (output force).
2) There are three classes of levers depending on the position of the fulcrum relative to the effort and resistance forces.
3) Levers allow a smaller input force to overcome a larger resistance, but cannot produce more work output than work input due to the law of conservation of energy. Machines either increase or change the direction of force and can allow the same work to be done with less effort.
Power
Power is defined as the rate at which work is done or energy is transferred. It can be calculated using the formula Power = Work / Time. Examples are given to demonstrate how to calculate the power required to lift objects like a truck or baby in a given amount of time by determining the work done and dividing by the time taken. Practice problems are provided to calculate the work done by a force moving an object a distance or the distance moved given the work done.
3 using machines
This document discusses compound machines, efficiency, and power.
1) Compound machines are machines made of two or more simple machines like an axe which is a combination of a wedge and lever. The document asks what simple machines make up common compound machines.
2) Efficiency is a measure of how much useful work is obtained from the work put in. It is calculated as the output work divided by the input work. Examples of efficiency calculations are given.
3) Power is the rate at which work is done and is measured in Watts. The power equation and examples of power calculations are provided.
Work And Power
This document defines work and how to calculate it. It explains that work requires a force to be exerted on an object in the direction of its motion over some distance. It provides the formula for work (Work = Force x Distance) and defines the units of Newtons, meters, and Joules. It also defines power as the rate of doing work, and gives the formula to calculate power (Power = Work / Time). Several examples are provided to demonstrate calculating work and power.
2008 Simple Machines
This document discusses how machines make work easier by changing the amount of force needed, the distance over which force is applied, or the direction of the applied force. It defines simple machines, mechanical advantage, efficiency, and ideal machines. Specifically, it explains that machines reduce the needed force but may increase the distance of application. The mechanical advantage is the output force divided by the input force. Efficiency compares the work output to work input as a percentage, with higher percentages indicating less energy loss and more efficient machines. An ideal machine would lose no energy to friction.
Semi Perpetual Motion Machine(ppt)
This document describes a semi-perpetual motion machine designed by Harsh Gupta. It works on the principle of centripetal force using a system of gears, shafts and bearings. The central gear provides rotation to three outer gears. Weights are added to the outer gears to provide a high rotational force from a small manual input. While perpetual motion violates thermodynamics, this design aims to generate more power output than input using centrifugal and rotational forces. Potential applications include power generation for irrigation in times of drought.
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This document discusses key concepts for analyzing machines, including mechanical advantage, speed ratio, and efficiency. It provides formulas and examples for calculating each. Mechanical advantage is the ratio of output force to input force. Speed ratio looks at the distance an object moves compared to the distance the input force is applied. Efficiency compares mechanical advantage to speed ratio to determine how much energy is lost, with higher percentages being more efficient. Complex machines tend to have lower efficiencies due to multiple components and friction losses.
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This document describes the ideal features of an extraction arm. The arm must be flexible and able to move in any direction with up to 60 Newtons of force. It maintains its position over the entire work area after the force is reduced. The arm is also easy to use with one hand, holds its position cantilevered, and allows the welder to focus fully on the workpiece.
Unit d vocabulary words
This document provides a list of 17 vocabulary words related to mechanical systems, machines, and physics. The words include types of simple machines like the lever, incline plane, and pulley. More complex machines involving linkages, transmissions, and gears are also listed. Finally, concepts related to analyzing machines such as mechanical advantage, friction, efficiency, and work are included.
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This document defines and describes key optical terms and concepts. It explains the differences between concave and convex lenses and mirrors, and how they bend and focus light. It also defines transparency, reflection, bioluminescence, and the parts of the eye. Various light properties and production methods are outlined as well, including amplitude, wavelength, frequency, fluorescence, and the electromagnetic spectrum.
Unit d - section 2.3 -- hydraulics
Hydraulic systems use liquid under pressure to increase mechanical advantage. They allow heavy loads to be moved more easily and safely than was possible with simple machines. Hydraulics work through Pascal's law - pressure applied to an input piston is distributed equally throughout the liquid and exerts force on a larger output piston, multiplying the mechanical advantage. This principle enables construction projects to be completed more efficiently using hydraulics rather than manual labor alone.
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Work is defined as a force applied to an object, moving it a distance. Simple machines like levers, pulleys, and inclined planes make work easier by multiplying applied forces or distances moved. They provide mechanical advantages but also lose efficiency due to friction. Common simple machines are described along with their applications, mechanical advantages, and efficiency considerations.
Mechanical Advantage Of Machines
Mechanical advantage refers to the number of times a machine multiplies force. There are two types: theoretical mechanical advantage (TMA), which considers distances moved; and actual mechanical advantage (AMA), which considers applied and produced forces. Efficiency is the ratio of output work to input work, and is less than 100% due to friction converting some input work to heat. Sample problems demonstrate calculating TMA, AMA, efficiency, effort, and work input using relevant equations.
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This document provides an overview of simple machines, including definitions and examples. It discusses how simple machines can change the direction or magnitude of a force but cannot create energy. While simple machines reduce the amount of force needed to do work, the distance of movement is also reduced. The mechanical advantage of a machine is the ratio between the input and output forces or distances, with ideal machines matching the input and output distances. Examples are provided to demonstrate calculating work, power, efficiency and mechanical advantage.
Design and Construction of A Can Crusher Machine
1) The document describes the design and construction of a can crusher machine by a student at Khulna University of Engineering & Technology.
2) The objectives of the project were to study different can crusher machines, familiarize with the parts, and construct a machine to better recycle cans.
3) The design is based on a slide crank mechanism that converts rotational motion to linear motion through a connecting rod and ram to dynamically crush cans.
Simple Machines
The document discusses machines and the six simple machines: inclined planes, wedges, screws, levers, wheels and axles, and pulleys. It defines a machine as a device that makes work easier by changing the force, distance, or direction of force needed. Machines provide mechanical advantage by increasing output force over input force. Efficiency compares output work to input work and is reduced by friction. The document provides examples and formulas for calculating mechanical advantage of each simple machine.
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This document discusses simple machines and their uses. It defines six types of simple machines: lever, pulley, wheel and axle, inclined plane, screw, and wedge. For each machine it explains how it works and provides examples. It also covers concepts like work, energy, power, mechanical advantage, efficiency, and how machines conserve energy. Simple machines allow us to do work more easily by reducing the amount of force needed.
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This document provides notes on simple machines that are not included in the textbook. It defines a simple machine as a device that makes work easier using minimal moving parts, often through human power. Examples given are inclined planes and pulleys. Simple machines allow a smaller force to be applied over a greater distance to do the same amount of work. They multiply the input force but do not reduce the total work. Mechanical advantage is the ratio of output to input force, while efficiency accounts for real-world friction. Formulas are provided for calculating work input and output, as well as mechanical advantage and efficiency of inclined planes and pulleys. A sample problem is worked through as an example.
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The document discusses work, power, and simple machines. It defines work as the movement of an object by force, measured in foot-pounds or joules. Power is defined as the rate of work over time. It then discusses the six simple machines: lever, wheel and axle, pulley, inclined plane, wedge, and screw. Levers in particular are described as multiplying force or speed with or without changing the direction of effort, consisting of a rigid bar and fulcrum.
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This document discusses work, power, simple machines, and compound machines. It defines work as a force acting through a distance, and power as the rate at which work is done. Six simple machines are described: inclined planes, wedges, screws, levers, pulleys, and wheels and axles. Compound machines combine two or more simple machines to make work easier by changing the input force, distance, or direction of force. The mechanical advantage of machines allows work to be done with less input force.
1 why we use machines
We use machines to make work easier by multiplying the effort force applied. There are two types of work - work input is the work done on the machine, while work output is the work done by the machine. An ideal machine's work input equals its work output. Mechanical advantage is how much a machine multiplies the effort force, making work easier, and is calculated by dividing the resistance force by the effort force. Different simple machines have different mechanical advantage formulas.
Work and machines
1) A lever is a simple machine that uses a bar to change the direction or magnitude of a force. It has three main parts: the fulcrum (point of support), the effort force (input force), and the resistance (output force).
2) There are three classes of levers depending on the position of the fulcrum relative to the effort and resistance forces.
3) Levers allow a smaller input force to overcome a larger resistance, but cannot produce more work output than work input due to the law of conservation of energy. Machines either increase or change the direction of force and can allow the same work to be done with less effort.
Power
Power is defined as the rate at which work is done or energy is transferred. It can be calculated using the formula Power = Work / Time. Examples are given to demonstrate how to calculate the power required to lift objects like a truck or baby in a given amount of time by determining the work done and dividing by the time taken. Practice problems are provided to calculate the work done by a force moving an object a distance or the distance moved given the work done.
3 using machines
This document discusses compound machines, efficiency, and power.
1) Compound machines are machines made of two or more simple machines like an axe which is a combination of a wedge and lever. The document asks what simple machines make up common compound machines.
2) Efficiency is a measure of how much useful work is obtained from the work put in. It is calculated as the output work divided by the input work. Examples of efficiency calculations are given.
3) Power is the rate at which work is done and is measured in Watts. The power equation and examples of power calculations are provided.
Work And Power
This document defines work and how to calculate it. It explains that work requires a force to be exerted on an object in the direction of its motion over some distance. It provides the formula for work (Work = Force x Distance) and defines the units of Newtons, meters, and Joules. It also defines power as the rate of doing work, and gives the formula to calculate power (Power = Work / Time). Several examples are provided to demonstrate calculating work and power.
2008 Simple Machines
This document discusses how machines make work easier by changing the amount of force needed, the distance over which force is applied, or the direction of the applied force. It defines simple machines, mechanical advantage, efficiency, and ideal machines. Specifically, it explains that machines reduce the needed force but may increase the distance of application. The mechanical advantage is the output force divided by the input force. Efficiency compares the work output to work input as a percentage, with higher percentages indicating less energy loss and more efficient machines. An ideal machine would lose no energy to friction.
Semi Perpetual Motion Machine(ppt)
This document describes a semi-perpetual motion machine designed by Harsh Gupta. It works on the principle of centripetal force using a system of gears, shafts and bearings. The central gear provides rotation to three outer gears. Weights are added to the outer gears to provide a high rotational force from a small manual input. While perpetual motion violates thermodynamics, this design aims to generate more power output than input using centrifugal and rotational forces. Potential applications include power generation for irrigation in times of drought.
Unit d - section 2.1 --machines make work easier
This document discusses key concepts for analyzing machines, including mechanical advantage, speed ratio, and efficiency. It provides formulas and examples for calculating each. Mechanical advantage is the ratio of output force to input force. Speed ratio looks at the distance an object moves compared to the distance the input force is applied. Efficiency compares mechanical advantage to speed ratio to determine how much energy is lost, with higher percentages being more efficient. Complex machines tend to have lower efficiencies due to multiple components and friction losses.
The perfect extraction arm
This document describes the ideal features of an extraction arm. The arm must be flexible and able to move in any direction with up to 60 Newtons of force. It maintains its position over the entire work area after the force is reduced. The arm is also easy to use with one hand, holds its position cantilevered, and allows the welder to focus fully on the workpiece.
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This document defines and describes key optical terms and concepts. It explains the differences between concave and convex lenses and mirrors, and how they bend and focus light. It also defines transparency, reflection, bioluminescence, and the parts of the eye. Various light properties and production methods are outlined as well, including amplitude, wavelength, frequency, fluorescence, and the electromagnetic spectrum.
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Hydraulic systems use liquid under pressure to increase mechanical advantage. They allow heavy loads to be moved more easily and safely than was possible with simple machines. Hydraulics work through Pascal's law - pressure applied to an input piston is distributed equally throughout the liquid and exerts force on a larger output piston, multiplying the mechanical advantage. This principle enables construction projects to be completed more efficiently using hydraulics rather than manual labor alone.
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The document contains instructions and observations for 5 student groups to conduct experiments on reversible and irreversible changes. Group 1 mixes different substances with water, vinegar or lemon juice to observe if reactions are reversible or irreversible. Group 2 burns different materials to observe changes. Group 3 heats materials to observe melting or other changes. Group 4 uses plaster of Paris and notes its properties. Group 5 observes dough rising before and after leaving it to rise.
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Unit d - section 3.2 -- technology develops through change
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There are six simple machines: lever, pulley, wheel and axle, inclined plane, screw, and wedge. They allow a smaller force to overcome a larger force or move a load a greater distance. The actual mechanical advantage of a machine is the ratio of the output force to the input force. The ideal mechanical advantage is the ratio of the input distance to the output distance. Due to friction and other losses, the efficiency of a machine is the ratio of its output work to its input work and is always less than 100%. Simple machines allow work to be done more easily by changing either the size, direction, or point of application of a force.
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This document summarizes the basic principles of six simple machines: the inclined plane, wedge, screw, lever, wheel and axle, and pulley. It defines each machine, describes how they work mechanically to make work easier by changing either the size or direction of force needed, and provides examples of common uses. The summary concludes by reviewing key concepts like work, power, pressure, and Newton's Laws of Motion.
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This document defines key vocabulary related to machines and their operation. It describes six simple machines - the lever, inclined plane, wheel and axle, pulley, wedge, and screw. Each simple machine is defined and examples are provided of how it multiplies force or changes the direction of force. The document also explains how machines transfer energy and do work, noting that their efficiency is always less than 100% due to energy lost to friction and other forces. It provides the formulas for calculating mechanical advantage and defines compound machines.
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2) A pulley system uses wheels and a rope or chain to lift loads. Multiple pulleys can be arranged in series to increase mechanical advantage.
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Here are the solutions to the numerical problems:
1. i) Effort = 500/1.25 = 400N
ii) MA = 1.25
iii) VR = 1.25
iv) Efficiency = 100%
2. i) MA = 5
ii) VR = 4
iii) Efficiency = 80%
3. Effort = 1200 * 60/25 = 2880N
4. Efficiency = (400/600) * (40/20) * 100% = 80%
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This document provides information about simple machines. It describes the six basic simple machines: inclined plane, lever, pulley, wedge, wheel and axle, and screw. It explains that simple machines make work easier by changing the amount of force needed, the distance over which force is applied, or the direction of the applied force. The document gives examples of each type of simple machine and discusses how compound machines are combinations of two or more simple machines. It also defines mechanical advantage as the ratio of output force to input force and efficiency as the ratio of output work to input work.
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Unit d review
- 1. Mr.Ilko
- 2. Know examples of the 6 different types; ◦ Levers – Class 1, 2, 3 ◦ Screw ◦ Wedge ◦ Ramp ◦ Wheel and Axel ◦ Pulley
- 3. Fulcrum in the middle, effort and load on the ends
- 4. Fulcrum on the end, load in the middle and effort on the other end
- 5. Fulcrum on the end, effort in the middle and load on the other end
- 11. Where more than one simple machine works together in order to perform a task
- 12. Have inter-connecting teeth that merge with other gears in order to turn Two or more gears working together creates a mechanical advantage through a gear ratio
- 14. An assembly of moving parts used to manage motion
- 15. Is the force that opposes motion Every device cannot have 100% efficiency because they will always have friction to deal with Friction requires energy to over come it
- 16. MA is calculated by dividing the output force by the input force MA = Output force Input force
- 17. Is calculated by dividing your input distance by your output distance SA = Input distance Output distance
- 18. Always written as a percentage A machine with 20% efficiency means 80% of its energy is lost to heat Efficiency is solved by dividing MA by SA and then multiplying by 100 Eff = MA x 100 SA
- 19. W = Force x Distance Work only occurs when the object moves
- 20. Hydraulics – use liquids in order to create pressure to lift objects Pneumatics – Use gas as a means to create pressure to lift objects