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chp 12 vocab PS
Question | Answer |
---|---|
the transfer of energy to a body by the application of a force that cause the body to move in the direction of the force | work |
a quantity that measures the rate at which work is done or energy is transformed | power |
a quantity that measures how much a machine multiples a force or distance | mechanical advantage |
one of the six basic types of machines, which are the basis of all other forms of machines | simple machine |
a machine made of one or more simple machines | compound machine |
the energy that an object has because of the position, shape, or condition of the object | potential energy |
the energy of a moving object due to the objects motion | kinetic energy |
the amount of work an object can do because of the objects kinetic and potential energies | mechanical energy |
a quatity, usually expressed as a percentage, that measures the ratio of useful work output to work input | efficency |