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8th: Unit 3

Work, Energy, Heat & Temperature Key Terms 2017-2018

TermDefinition
Energy the ability to cause change
Kinetic Energy energy in the form of motion
Potential Energy energy that is stored
Mechanical Energy total amount of kinetic energy and potential energy in a system
The Law of Conservation of Energy energy may change form, but it cannot be created or destroyed under ordinary conditions
Work transfer of energy that occurs when a force makes an object move
Calculating Work Work = force times distance
Power the rate at which work is done
Calculating Power Power = work divided by time
Machine device that makes doing work easier
Input Force the force applied to a machine
Output Force the force applied by a machine
Mechanical Advantage the ratio of the output force to the input force
Efficiency measure of how much work put into a machine is changed into useful output work by the machine
Simple Machine machine that does work with only one movement of the machine
Lever simple machine with a bar that is free to pivot around a fulcrum
Fulcrum the point on which a lever rests or is supported and on which it pivots.
Pulley simple machine with a grooved wheel with a rope, chain, or cable running along groove
Wheel and Axle simple machine that consists of an axle attached to the center of a larger wheel so that both pieces rotate together
Inclined Plane simple machine with a sloping surface that reduces the amount of force required to do work
The Screw simple machine with an inclined plane wrapped in a spiral around a cylindrical post
The Wedge simple machine with an inclined plane with one or two sloping sides
Compound Machine two or more simple machines that operate together
Created by: darrin_evans
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