Lever
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A lever is a simple machine that consists of a rigid beam and a fulcrum. Force is applied to either end of the beam to lift or move objects. There are three classes of levers: first class levers have the fulcrum between the effort and load, second class levers have the load between the effort and fulcrum, and third class levers have the fulcrum at one end and the effort between the fulcrum and load. Examples of each class are also provided such as scissors for first class and a wheelbarrow for second class. The document concludes with an interactive game to test the reader's understanding of the three classes of levers.
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Simple machines by Saliha Rais, for grade 5.
The slide show include topics: simple machines, force magnifiers, movement magnifiers, levers and its types. At the end there is a short review/test, so you can assess what you have learned.
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The document discusses levers and mechanical advantage. It defines effort force as the force applied and resistance force as the force of the machine. Mechanical advantage measures how many times the resistance force is greater than the effort force. It also discusses the difference between ideal and actual mechanical advantage when accounting for friction and resistance. Finally, it defines the three types of levers and provides examples for each type.
Levers notes
1. A lever is a rigid rod that rotates around a fulcrum to move a load using an applied effort force.
2. There are three classes of levers - first, second, and third - which are distinguished based on the relative positions of the fulcrum, effort, and load.
3. The mechanical advantage of a lever is the ratio of the distances of the effort and load from the fulcrum, and determines whether the lever multiplies or reduces the applied effort. First and second class levers provide a mechanical advantage while third class levers provide a mechanical disadvantage.
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This document discusses lever systems and their components. It defines key terms like lever, fulcrum, effort force, resistance force, and mechanical advantage. It describes the three classes of levers - first, second, and third class levers - and provides examples of each. It also covers calculating mechanical advantage using formulas and solving for individual parts. Finally, it discusses the effects of friction on lever systems.
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The document discusses how a lever can be used to lift an elephant. It explains that a lever is a simple machine that rotates around a fulcrum and uses effort and load forces. When the fulcrum is closer to the load, less effort is required. The document then gives an example calculation to determine the length of the rod needed for a man weighing 250N to lift an elephant weighing 50,000N when the fulcrum is 3m from the elephant. Through lever calculations, it is determined the length would need to be 6m.
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A lever is a simple machine that consists of a rod or bar that rests on and rotates around a fixed point called a fulcrum. Applying force at one end of the lever allows a load to be lifted at the other end with less effort. There are three classes of levers - first class has the fulcrum between the effort and load, second class has the load between the effort and fulcrum, and third class has the effort between the fulcrum and load. Levers are used in machines like catapults and are also found in the human body at joints.
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The document discusses levers and mechanical advantage. It defines effort force as the force applied and resistance force as the force of the machine. Mechanical advantage measures how many times the resistance force is greater than the effort force. It also discusses the difference between ideal and actual mechanical advantage when accounting for friction and resistance. Finally, it defines the three types of levers and provides examples for each type.
Levers notes
1. A lever is a rigid rod that rotates around a fulcrum to move a load using an applied effort force.
2. There are three classes of levers - first, second, and third - which are distinguished based on the relative positions of the fulcrum, effort, and load.
3. The mechanical advantage of a lever is the ratio of the distances of the effort and load from the fulcrum, and determines whether the lever multiplies or reduces the applied effort. First and second class levers provide a mechanical advantage while third class levers provide a mechanical disadvantage.
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This document discusses lever systems and their components. It defines key terms like lever, fulcrum, effort force, resistance force, and mechanical advantage. It describes the three classes of levers - first, second, and third class levers - and provides examples of each. It also covers calculating mechanical advantage using formulas and solving for individual parts. Finally, it discusses the effects of friction on lever systems.
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The document describes several simple machines: the lever, inclined plane, pulley, wheel and axle, screw, and wedge. It explains how each machine works and provides examples. The lever uses a rigid bar and fulcrum to move a load more easily with less force over a greater distance. There are three classes of levers depending on the position of the fulcrum. An inclined plane allows loads to be moved with less force but over a greater distance. Pulleys can be movable or fixed and change the direction or increase the mechanical advantage of a force. A wheel and axle rotate around a central axis to lift or move loads. A screw is an inclined plane wrapped in a spiral around a cylinder. A wedge
Simple machines
Machines are tools that use energy to perform tasks. Simple machines include levers, which rotate around a fixed point called a fulcrum. Levers can be classified as first, second, or third order depending on the position of the load, effort, and fulcrum. The mechanical advantage of a lever depends on the relative distances of the load and effort from the fulcrum, with second order levers providing the greatest mechanical advantage.
CO1 20223 SCI6 Q3 WK7 D2 - FINAL.pptx
The document discusses levers and their classification. It describes the three parts of a lever - fulcrum, load, and effort. It identifies the three types of levers as first, second, and third class levers. First class levers have the fulcrum in the middle. Second class levers have the load in the middle. Third class levers have the effort between the load and fulcrum. Examples are given such as hammers and pliers for first class levers. The document emphasizes that levers make work easier, faster, and safer.
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1. The document discusses different types of electric lamps, including light bulbs and fluorescent lamps.
2. Light bulbs consist of a tungsten filament, copper wires, and a glass bulb filled with inert gas. The filament glows when electric current passes through it.
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Lever
- 1. Lever By Carson, Ryan, Dian and Xin Rou
- 2. What is It? 01 What is Lever? Uses 02 What is it for? The 3 Classes 03 First Class + Examples Second Class + Examples Third Class + Examples Table Of Contents Game! 04 Let’s play a game to revise!
- 3. Machine! There are many types of machines. Today we are going to tell you what is a lever. Then, you are going to revise with a game!
- 4. What is it? 01 What is a lever?
- 5. A lever is a simple machine made of a rigid beam and a fulcrum. The effort (input force) and load (output force) are applied to either end of the beam. The fulcrum is the point on which the beam pivots. When an effort is applied to one end of the lever, a load is applied at the other end of the lever. This will move a mass upward. Levers rely on torque for their operation. Torque is the amount of force required to cause an object to rotate around its axis (or pivot point).
- 6. Load arm Effort arm Fulcrum Axis about which the lever turns, fixed point Lever Straight / Bend bar, turns about the fulcrum Lever parts 01 03 02 04
- 7. Uses What are the uses of a lever? 02
- 8. Uses We use a lever to move or lift objects.Levers can be used to exert a large force over a small distance at one end by exerting only a small force over a greater distance at the other.
- 9. The 3 Classes of Lever! 03 What are the 3 Classes of Lever?
- 10. Class 3 Class 2 Class 1 Kinds of Lever 01 03 02 FLE!!!
- 11. First Class Lever First class levers have the fulcrum between the force and the load. In using a screwdriver to lift the lid from a paint tin you are moving the effort over a greater distance than the load. ... Other examples of first class levers are pliers, scissors, a crow bar, a claw hammer, a see-saw and a weighing balance.
- 13. Break Time
- 14. Times Up!
- 15. Second Class Lever Second class levers have the load the effort and the fulcrum. A wheelbarrow is a second class lever.The wheel is the fulcrum, the handles take the effort,And the load is placed between the wheel and the effort(person doing the lifting).The effort always travels a greater distance and is less than the load.
- 17. A third-class lever is another example of a simple machine comprising a beam placed upon a fulcrum. In third-class levers, the fulcrum remains at one end of the beam.But the force of the effort is now located between the fulcrum and the force of the load. Third Class Lever effort
- 19. Questions 👍🏻👍🏻👍🏻 1st class 👍🏻👍🏻👍🏻 2nd class 👍🏻👍🏻👍🏻 3rd class 👍🏻👍🏻👍🏻 2nd class 👍🏻👍🏻👍🏻 1st class
- 20. Video!
- 22. Blooket
- 23. Thank You!