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MOTION (Motion in Mechanism (Pulleys (Types Of Pulley (Rope and pulley
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MOTION
DEFINITION OF MOTION
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An act, process, or instance of changing place
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Motion in Mechanism
Levers
Types Of levers
1st Class Lever
Fulcrum in the middle: the effort is applied on one side
of the fulcrum and the resistance (or load) on the other
side
For Example: a seesaw, a crowbar or a pair of scissors.
2nd Class Lever
Resistance (or load) in the middle: the effort is applied
on one side of the resistance and the fulcrum is located
on the other side
For Example: a wheelbarrow, a nutcracker, a bottle
opener or the brake pedal of a car.
3rd Class Lever
Effort in the middle: the resistance (or load) is on one
side of the effort and the fulcrum is located on the other
side.
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Pulleys
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A pulley is a wheel on an axle or shaft that is
designed to support movement and change of
direction of a taut cable, rope or belt along its
circumference. Usually from rotary motion to linear motion.
Gears
Type Of Gears
Spur Gear
Helical Gear
Herringbone Gear
Bevel Gear
Worm Gear
Rack and Pinion
Internal and External Gear
Face Gear
Screws
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A screw is a type of fastener, sometimes similar to a
bolt, typically made of metal. It usually requires the rotary motion.
Cams and Followers
Cams
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A cam is a rotating or sliding piece in a mechanical Cams
linkage used especially in transforming rotary motion
into linear motion or vice versa
Followers
A cam follower, also known as a track follower, is a specialized type of roller or needle bearing designed to
follow cam lobe profiles. Cam followers come in a vast
array of different configurations, however the most
defining characteristic is how the cam follower mounts to its mating part; stud style cam followers use a stud while the yoke style has a hole through the middle.
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On the Road
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Motion of the cars will stop and go on the roads, speed of the cars will be different too
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Motion in Physics
In physics, motion is a change in position of an object over time. Motion is described in terms of displacement, distance, velocity, acceleration, time and speed.
Laws of Motion
1st Law
Newton's first law of motion is that an object tends to continue in its motion at a constant velocity until and unless an outside force acts on it. The term velocity refers both to the speed and the direction in which an object is moving.
2nd Law
Newton's second law clearly states the relationship between motion and force. Mathematically, the law can be stated as F = m · a , where F represents the force exerted on an object, m is the object's mass, and a is the acceleration given to the object. The term acceleration means how fast the velocity of an object is changing and in what direction.
3rd Law
Newton's third law says that for every action there is an equal and opposite reaction. A simple example of the law is a rocket. A rocket is simply a cylindrical device closed at one end and open at the other end in which a fuel is burned. As the fuel burns, hot gases are formed and released through the open end of the rocket. The escape of the gases in one direction can be considered as an action. Newton's law says that this action must be balanced by a second action that is equal in magnitude and opposite in direction. That opposite action is the movement of the rocket in a direction opposite that of the escaping gases. That is, the gases go out the back of the rocket (the action), while the rocket itself moves forward (the reaction).
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