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Unit 2

Work, Energy, and Machines

TermDefinition
Work The force to move an object some distance in the direction of the force.
Energy The ability to do work.
Power The rate at which work is done.
Kinetic Energy The energy of motion.
Potential Energy The energy an object has because of its position, condition, or chemical composition.
Mechanical Energy The energy possessed by a object due to its motion and position.
Machine Any device that helps people do work by changing the way work is done.
Mechanical Advantage The number of times the machine multiplies the input force.
Mechanical Efficiency A comparison of a machine's work output with the work input
Lever A simple machine that has a bar that pivots at a fixed point.
Fulcrum The fixed point in a lever.
Wheel and Axle A machine that is made of a wheel connected to a small cylindrical object, the axle.
Pulley A simple machine that has a grooved wheel that holds a rope or cable.
Inclined Plane A simple machine that is a straight, slanted surface.
Created by: 18boller0315
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