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Motion and Forces

Unit 2 1-3

Work Is the use of force to move an object some distance in the direction of the force.
Energy Is the ability to do work.
Power Is the rate at which work is done.
Kinetic energy Is the energy of motion.
Potential energy Is the energy an object has because of its position, condition, or chemical composition.
Mechanical energy Is the energy possessed by an abject due to its motion and position.
Machine Is any device that helps people do work by changing the way work is done.
Mechanical advantage Is the number of times the machine multiplies the input force.
Mechanical efficiency Is a comparison of machine's work output with the work input.
Lever Is a simple machine that has a bar that pivots at a fixed point.
Fulcrum A fixed point.
Wheel and axle Is a simple machine that is made of a wheel connected to a smaller cylindrical object, the axle.
Pulley Is a simple machine that has a grooved wheel that holds a rope or a cable.
Inclined plane Is a simple machine that is straight, slanted surface.
Created by: 18ccasey0505