Simple Machines

4. oothed wheels that work together to alter the relation between the speed of a driving mechanism (such as the engine of a vehicle or the crank of a bicycle) and the speed of the driven parts (the wheels).
7. a wheel attached to a smaller axle, and the two parts rotate together
10. rigid bar resting on a pivot, used to help move a heavy or firmly fixed load with one end when pressure is applied to the other.
12. the rate at which work is done measured in Watt or Work / Time.
14. axis or center that a wheel or disc spins.
16. a measure of the force that can cause an object to rotate about an axis
18. slows down speed
19. father of simple machines
20. A pulley is a wheel on an axle allows rope or cable or belt to pass over the wheel to move and change direction, or transfer power between

1. center piece or pivot point
2. solid bar that rotates around a pivot and makes it easier to lift a load, move a heavy object, or apply a force.
3. wood, metal, or some other material having one thick end and tapering to a thin edge, that is driven between two objects or parts of an object to secure or separate them.
4. keeps us grounded at 9.8 m/s
5. lender, sharp-pointed metal pin with a raised helical thread running around it and a slotted head, used to join things together by being rotated so that it pierces wood or other material and is held tightly in place.
6. simple machine consisting of a sloping surface, used for raising heavy bodies.
8. effort or force you put into a machine.
9. movement of an object resulting from a force applied to it. W= Force (F) x Distance (D).
11. another name for speed
13. provide a Mechanical Advantage (amplifies a small input force to produce a greater output force)
15. force the machine produces as a result of the input force.
17. push or a pull. The unit of Force is called the Newton. Force (F) = Mass x Acceleration.