Across
- 2. 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
- 4. The S1 unit of power one watt is expended when one joule of work is done in one second
- 6. a simple machine made of a bar that turns about a fixed point
- 9. energy energy of position usually related to the relative position of two things such as a stone and the earth
- 11. The product of the force on an object and the distance through which the object is moved
- 12. the ratio of useful energy output to total energy input or the percentage of the work input that is converted to work output
- 14. energy energy of motion equal to half the mass multiplied by the speed squared
- 15. of conversation of energy energy cannot be created or destroyed it may be transformed from one form into another but the total amount of energy never changes
Down
- 1. the S1 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
- 3. Rate at which work is done or energy is transformed equal to the work done or energy transformed divided by time
- 5. a device for increasing or decreasing a force or simply changing the direction of a force
- 7. that property of an object or system which enables it to do work
- 8. energy the energy due to the position or the movement of something potential or kinetic energy
- 10. advantage the ratio of output force to input force for a machine
- 13. the pivot point of a lever