Energy

3. hat property of an object or a system which enables it to do work
5. a device for increasing a force or simply changing the direction of a force
8. energy energy of position, usually related to the relative position of two things, such as a stone and the earth
9. energy the energy due to the position or the movement of something; potential or kinetic energy
11. advantage the ratio of output force to input force for a machine
12. the product of the force on an object and the distance through which the object is moved
13. the SI unit of power; one watt is expended when one joule of work is done in one second
14. the SI unit of work and of all other forms of energy; one joule of work is done when a force of one newton is exerted on an object moved one meter in the direction of the force
15. a simple machine, made of a bar that turns about a fixed point

1. the pivot point of a lever
2. energy energy of motion, equal to half the mass multiplied by the speed squared
4. the ratio of useful energy output to total energy input, or the percentage of the work input that is converted to work output
6. a type of lever that is a wheel with a groove in its rim, and one that is used to change the direction of a force
7. rate at which work is done or energy is transformed, equal to the work done or energy transformed divided by time
10. energy cannot be created or destroyed; it may be transformed from one form into another, but the total amount of energy never changes