UNIT D

2. pair of wheels with teeth that interlink
4. a device that helps us do work
5. force applied to operate a machine
6. when pressure is applied to a liquid in a container
9. measurement of how well a machine or device uses energy
11. a machine made up of a wire,rope,or cable on a grooving wheel
15. a system in which simple machines all work together
16. simple machine made up of a flat surface
18. measure of how the speed of the object is affected by a machine
19. simple machine that looks like an inclined plane, but is forced into an object
22. purpose or task

1. force that opposes motion
3. a simple machine made up of a rigd bar or plank that rotates
4. amount by which a machine can multiply a force
7. force a machine applies to an object
8. tool or device made up of one basic machine
10. a group of parts that work together to perfrom a general function
12. planning and drawing to show the look or function
13. made up of two wheels of different diameters that turn together
14. special type of linkage for tranfering the energy from the engine to the wheels in large vehicles such as cars
17. a machine that consists of a cylinder with a groove cut
18. smaller groups of parts within a complex machine that perform a specfic function
20. belt or chain to transfer energy from an energy source to an cbject
21. done when a force acts on an object to make the object move