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Willard Science 13

Chapter 13 Key Terms

QuestionAnswer
Work The transfer of energy to an object by the application of a force that causes the object to move in the direction of the force.
Power A quantity that measures the rate at which work is done or energy is transformed.
Mechanical advantage A quantity that expresses how much a machine multiplies force or distance.
Simple Machine One of the six basic types of machines, which are the basis for all other forms of machines.
Compound machine A machine made of more that one simple machine.
Energy The capacity to do work
Potential energy The energy that an object has because of the position, shape, or condition of the object.
Kinetic energy The energy of an object due to the object's motion.
Mechanical energy The amount of work an object can do because of the object's kinetic and potential energies.
Efficiency A quantity, usually expressed as a percentage, that measures the ratio of useful work output to work input.
Created by: bpulliam
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