Across
- 3. the SI unit of work and of all other forms of energy; one joule (J) of work is done when a force of one newton (N) is exerted on an object moved one meter (m) in the direction of the force
- 7. the ratio of useful energy output to total energy input, or the percentage of the work input that is converted to work output
- 10. the ratio of output force to input force for a machine
- 11. that property of an object or a system which enables it to do work
- 13. energy of position, usually related to the relative position of two things, such as a stone and the earth
- 14. energy cannot be created or destroyed; it may be transformed from one form into another, but the total amount of energy never changes
- 15. a simple machine, made of a bar that turns about a fixed point
Down
- 1. the product of the force on an object and the distance through which the object is moved
- 2. the energy due to the position or the movement of something; potential or kinetic energy (or a combination of both)
- 4. rate at which work is done or energy is transformed, equal to the work done or energy transformed divided by time
- 5. the pivot point of a lever
- 6. a device for increasing (or decreasing) a force or simply changing the direction of a force
- 8. energy of motion, equal to half the mass multiplied by the speed squared
- 9. the SI unit of power; one watt (W) is expended when one joule (J) of work is done in one second (s)
- 12. 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