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Chp 4 Vocab-PS
Question | Answer |
---|---|
a combination of two or more simple machines | compound machine |
measure of how much work put into a machine is changed into useful output by the machine | efficiency |
a device that makes doing work easier | machine |
the ratio of the output force to the input force | mechanical advantage |
the application of a force through a distance | work |
energy stored in chemical bonds | chemical energy |
the ability to cause change | energy |
energy stored by things that stretch or shrink | elastic potential energy |
energy stored by things that are above Earth | gravitational potential energy |
energy in the form of motion | kinetic energy |
energy stored in motionless object | potential |
anything around which you can imagine a boundary | system |
energy may change from one form to another, but the total amount of energy never changes | law of conservation of energy |
the total amount of potential and kinetic energy in a system | mechanical energy |
the rate at which energy is converted | power |
a combination of two or more simple machines | compound machine |