This document discusses simple machines and Newton's laws of motion. It begins by defining concepts like momentum, Newton's three laws of motion, and applications of the laws such as falling apples. It then discusses mechanical advantage, efficiency, and specific simple machines like levers, wheels and axles, and pulleys. Examples of machines that use these principles are also provided, such as jacks, winches, and crabs. Reference materials on engineering mechanics are listed at the end.
from this ppt you can almost aware about the operation of hydraulic turbines and various specification releated to it...
if you want to attains the knowledge about the turbines then must watch this ppt,... thankyou!
if you want to follow me on twitter then contact me at
ishantgautam51@yahoo.com
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from this ppt you can almost aware about the operation of hydraulic turbines and various specification releated to it...
if you want to attains the knowledge about the turbines then must watch this ppt,... thankyou!
if you want to follow me on twitter then contact me at
ishantgautam51@yahoo.com
Watch Video of this presentation on Link: https://youtu.be/xIGlZ3UvLdw
For notes/articles, Visit my blog (link is given below).
For Video, Visit our YouTube Channel (link is given below).
Any Suggestions/doubts/reactions, please leave in the comment box.
Follow Us on
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Small bore system: Wastewater EngineeringDhruv Saxena
Small bore sewer system is designed to collect and transport only the liquid portion of the domestic sewage for off-site treatment and disposal. This slideshow presents the description, components, design criteria of same.
Governing of the Turbine | Fluid MechanicsSatish Taji
Watch Video of this presentation on Link: https://youtu.be/LmJtNo-zgjo
For notes/articles, Visit my blog (link is given below).
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Permanent Way of Railway & Components ?(part -1,2,3,4,5)RAMPRASAD KUMAWAT
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Types and Selection of Gauges
The following presentation consists of a brief introduction to power screw that we use in our day to day life, its types, analysis of load, efficiency, application and examples with images.
Types of pipes and types of joints. Different types of pipes used for transporting water from reservoir or treatment plant for water supply in environmental engineering
Small bore system: Wastewater EngineeringDhruv Saxena
Small bore sewer system is designed to collect and transport only the liquid portion of the domestic sewage for off-site treatment and disposal. This slideshow presents the description, components, design criteria of same.
Governing of the Turbine | Fluid MechanicsSatish Taji
Watch Video of this presentation on Link: https://youtu.be/LmJtNo-zgjo
For notes/articles, Visit my blog (link is given below).
For Video, Visit our YouTube Channel (link is given below).
Any Suggestions/doubts/reactions, please leave in the comment box.
Follow Us on
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Permanent Way of Railway & Components ?(part -1,2,3,4,5)RAMPRASAD KUMAWAT
Permanent Way Components: , Selection of Alignment, Ideal Permanent Ways and Cross-sections in different conditions, Salient Features and types of Components viz.
Rails, Sleepers, Ballast, Rail Fastenings.
Types and Selection of Gauges
The following presentation consists of a brief introduction to power screw that we use in our day to day life, its types, analysis of load, efficiency, application and examples with images.
Types of pipes and types of joints. Different types of pipes used for transporting water from reservoir or treatment plant for water supply in environmental engineering
a short presentation on the biomechanics in Removable Partial Denture.... a very important topic to be understood completely for easy designing of cast framework and also to know the problems in already treated conditions
This is an excerpt from a presentation about knowledge management. Here is my somewhat jocular criticism of the term "leverage" and preference for the concept of information flowing through organizations (demonstrated by a windmill).
Mechanics was among the first of the exact sciences to be developed. Its internal beauty as a mathematical discipline and its early remarkable success in accounting in quantitative detail for the motions of the Moon, Earth, and other planetary bodies had enormous influence on philosophical thought and provided impetus for the systematic development of science.
Mechanics may be divided into three branches: statics, which deals with forces acting on and in a body at rest; kinematics, which describes the possible motions of a body or system of bodies; and kinetics, which attempts to explain or predict the motion that will occur in a given situation. Alternatively, mechanics may be divided according to the kind of system studied. The simplest mechanical system is the particle, defined as a body so small that its shape and internal structure are of no consequence in the given problem. More complicated is the motion of a system of two or more particles that exert forces on one another and possibly undergo forces exerted by bodies outside of the system.
The principles of mechanics have been applied to three general realms of phenomena. The motions of such celestial bodies as stars, planets, and satellites can be predicted with great accuracy thousands of years before they occur. (The theory of relativity predicts some deviations from the motion according to classical, or Newtonian, mechanics; however, these are so small as to be observable only with very accurate techniques, except in problems involving all or a large portion of the detectable universe.) As the second realm, ordinary objects on Earth down to microscopic size (moving at speeds much lower than that of light) are properly described by classical mechanics without significant corrections. The engineer who designs bridges or aircraft may use the Newtonian laws of classical mechanics with confidence, even though the forces may be very complicated, and the calculations lack the beautiful simplicity of celestial mechanics. The third realm of phenomena comprises the behaviour of matter and ele
Have you gone above the speed limit or driven without a license and gotten away? Well, you can’t get away with breaking the laws of physics! This session will highlight:
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Belt conveyor system_Advanced Construction Technology (Semester-6), Civil Eng...A Makwana
One of the most common form of material handling system used in mining industries and in construction projects.
Capable of conveying large quantities of material continuously over long distances at a fast speed.
Rai University provides high quality education for MSc, Law, Mechanical Engineering, BBA, MSc, Computer Science, Microbiology, Hospital Management, Health Management and IT Engineering.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
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The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
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Palestine last event orientationfvgnh .pptxRaedMohamed3
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2. Laws of Motion
• Concept of momentum
• In classical mechanics, linear momentum or
translational momentum is the product of the mass
and velocity of an object.
• For example, a heavy truck moving fast has a large
momentum—it takes a large and prolonged force to
get the truck up to this speed. If the truck were
lighter, or moving more slowly, then it would have
less momentum.
• Like velocity, linear momentum is a vector quantity,
possessing a direction as well as a magnitude:
• Ρ = mv
3. Newton’s Laws of Motion
• Newton's First Law of Motion:
• Every object in a state of uniform motion tends to
remain in that state of motion unless an external force is
applied to it.
• Newton's Second Law of Motion:
• The relationship between an object's mass m, its
acceleration a, and the applied force F is F = ma.
• Newton's Third Law of Motion:
• For every action there is an equal and opposite reaction.
4. Application
• Applications of Newton's First Law
• Blood rushes from your head to your feet while
quickly stopping when riding on a descending
elevator.
• The head of a hammer can be tightened onto the
wooden handle by banging the bottom of the handle
against a hard surface.
• A brick is painlessly broken over the hand of a
physics teacher by slamming it with a hammer.
5. Application
• Applications of Newton's Second Law
• An apple falling to the ground must be under the
influence of a force, according to his second law. That
force is gravity, which causes the apple to accelerate
toward Earth's center.
• Applications of Newton's third Law
• Newton reasoned that the moon might be under the
influence of Earth's gravity, as well, but he had to
explain why the moon didn't fall into Earth. Unlike
the falling apple, it moved parallel to Earth's surface.
6. Derivation Of Force Equation From
Second Law Of Motion
• The second law states that the net force on an
object is equal to the rate of change (that is, the
derivative) of its linear momentum p in an
inertial reference frame:
F = dp / dt
• The second law can also be stated in terms of
an object's acceleration. Since the law is valid
only for constant-mass systems, the mass can
be taken outside the differentiation operator by
the constant factor rule in differentiation.
7. Piles, Lifts, Bodies Tied with String
• Piles
• The response of a laterally loaded pile within a group
of closely spaced piles is often substantially different
than a single isolated pile. This difference is
attributed to the following three items:
1. The rotational restraint at the pile cap connection. The
greater the rotational restraint, the smaller the
deflection caused by a given lateral load.
2. The additional lateral resistance provided by the pile
cap. verifying and quantifying the cap resistance is
the primary focus of this research.
8. • 3. The interference that occurs between adjacent piles
through the supporting soil. Interference between
zones of influence causes a pile within a group to
deflect more than a single isolated pile, as a result of
pile-soil-pile interaction.
• Lifts
Lifting Functions
Attachments:
Chains
Cables
Ropes
Webbing
9. • Locations of attachment should be:
• Directly over/in alignment with the load's center of gravity
(CG).
• Above the load's CG.
• Bodies Tied With String
• block of mass 2 kg sits on a frictionless ramp and is tied to the
wall with a string as shown. The string is horizontal and tied to
the center of the block. If the ramp is inclined at 20 degrees,
what is the magnitude of the force from the block on the ramp?
10. Conservation of Momentum
• The sum of moment of two objects remains same
even after collision.
• In other words, the sum of moments of two objects
before collision and sum of moment of two objects
after collision are equal.
11. Impulsive Force
• The force that two colliding bodies exert on one another
acts only for a short time, giving a brief but strong push.
This force is called an impulsive force.
• During the collision, the impulsive force is much stronger
than any other forces that may be present; consequently, the
impulsive force produces a large change in the motion while
the other forces produce only small and insignificant
changes.
• For example, during the automobile collision shown in
Figure, the only important force is the push of the wall on
the front end of the automobile; the effects produced by
gravity and by the friction force of the road during the
collision are insignificant.
12. Simple Machine
• Concept of machine
• A machine is a tool that consists of one or more parts,
and uses energy to meet a particular goal.
• Machines are usually powered by mechanical,
chemical, thermal, or electrical means, and are often
motorized. Historically, a power tool also required
moving parts to classify as a machine.
• However, the advent of electronics technology has led
to the development of power tools without moving
parts that are considered machines.
13. Mechanical Advantage
• Mechanical advantage is a measure of the force
amplification achieved by using a tool, mechanical device
or machine system. Ideally, the device preserves the input
power and simply
• trades off forces against movement to obtain a desired
amplification in the output force.
• Machine components designed to manage forces and
movement in this way are called mechanisms.
• An ideal mechanism transmits power without adding to or
subtracting from it. This means the ideal mechanism does
not include a power source, and is frictionless and
constructed from rigid bodies that do not deflect or wear.
14. Mechanical Advantage
• A simple machine has an applied force that works against a
load force. If there are no friction losses, the work done on
the load is equal to the work done by the applied force. This
allows an increase in the output force at the cost of a
proportional decrease in the distance moved by the load.
• The ratio of the output force to the input force is the
mechanical advantage of the machine.
• If the simple machine does not dissipate or absorb energy,
then its mechanical advantage can be calculated from the
machine's geometry.
15. Velocity Ratio and Efficiency of A
Machine
• Speed ratio
• The requirement for power input to an ideal
mechanism to equal power output provides a simple
way to compute mechanical advantage from the
input-output speed ratio of the system.
• The power input to a gear train with a torque TA
applied to the drive pulley which rotates at an angular
velocity of ωA is
P=TAωA
16. • Efficiency
• Mechanical advantage that is computed using the
assumption that no power is lost through deflection,
friction and wear of a machine is the maximum
performance that can be achieved.
• For this reason, it is often called the ideal mechanical
advantage (IMA). In operation deflection, friction and
wear will reduce the mechanical advantage.
• The amount of this reduction from the ideal to the
actual mechanical advantage (AMA) is defined by a
factor called efficiency which is determined by
experimentation.
17. Law Of Machine
• Machines which are used to lift a load are governed
by the "Law of machines", which states that the effort
to be applied on the machine (p) is related to the
weight (w) which it can lift as –
p = mw + c
• Where m and c are positive constants which are
characteristics of the machine.
18. Simple Machines
• Lever
• A lever is a machine consisting of a beam or rigid rod
pivoted at a fixed hinge, or fulcrum.
• It is one of the six simple machines identified by
Renaissance scientists. The word comes from the
French lever, "to raise", relevant.
• A lever amplifies an input force to provide a greater
output force, which is said to provide leverage. The
ratio of the output force to the input force is the ideal
mechanical advantage of the lever.
19. • The law of the lever
• The lever is a movable bar that pivots on a fulcrum
attached to or positioned on or across a fixed point.
The lever operates by applying forces at different
distances from the fulcrum, or pivot.
1
20. • Wheel And Axle
• The wheel and axle is one of six simple machines
identified by Renaissance scientists drawing from
Greek texts on technology.
• The wheel and axle is generally considered to be a
wheel attached to an axle so that these two parts
rotate together in which a force is transferred from
one to the other.
• In this configuration a hinge, or bearing, supports the
rotation of the axle.
21. • Pulleys
• A pulley is a wheel on an axle that is designed to
support movement of a cable or belt along its
circumference.
• Pulleys are used in a variety of ways to lift loads,
apply forces, and to transmit power.
2
22. • A pulley is also called a sheave or drum and
may have a groove between two flanges
around its circumference.
• The drive element of a pulley system can be a
rope, cable, belt, or chain that runs over the
pulley inside the groove.
23. • Jacks Winch Crabs
• Fitted with heavy cast iron wall brackets. The
grooved wheel is of 25 cm diameter and gears are
machine cut.
• This apparatus is used for experiments in efficiency
of mechanical advantage. Weights are not included.
3
25. CONTENT REFERENCES
A TEXT BOOK OF ENGINEERING MECHANICS ,
R.S.KHURMI , S.CHAND & COMPANY PVT. LTD.
A TEXT BOOK OF ENGINEERING MECHANICS , Dr.
R.K.BANSAL , LAXMI PUBLICATION