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PS Ch 4 Vocab EM

Sections 1-2

QuestionAnswer
Energy a moving object has because of its motion; depends on the mass and speed of the object? kinetic energy
SI unit of energy? joule
Stored energy an object has due to its position? potential energy
Energy stored when an object its compressed or stretched? elastic potential energy
Energy stored in in chemical bonds? chemical potential energy
energy stored by objects due to their position above earth’s surface; depends on the distance above earth’s surface and the object’s mass? gravitational potential energy
sum of the potential energy and kinetic energy in a system? mechanical energy
states that energy can never be created or destroyed? law of conservation of energy
device that makes doing work easier? machine
force that is applied to the machine? input force
force applied by the machine? output force
ratio of the output force exerted by a machine to the input force applied to the machine? mechanical advantage
ratio of the output work done by the machine to the input work done on the machine, expressed as a percentage? efficiency
Created by: emercado97
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