Chapter 4 Vocabulary

3. The rate at which work is done.
4. A measure of how much useful work is accomplished by a machine compared to the energy put into it.
6. A group of objects or parts that work together.
8. Energy stored in a stretched or compressed object like a spring.
10. The sum of an object's kinetic and potential energy.
12. The energy of motion.
13. The ratio of the output force to the input force in a machine.
16. The energy stored in an object due to its height above the ground.

1. Stored energy based on position or condition.
2. The ability to do work or cause change.
5. Energy stored in the bonds of atoms.
7. The principle stating that energy cannot be created or destroyed, only transformed.
9. A combination of two or more simple machines working together.
11. A device that makes work easier.
14. A machine with only one movement.
15. The transfer of energy that occurs when a force is applied over a distance.