Chapter 4 Review

1. Chapter 4 Review by Mr. Reece

2. Complete each matching section • ___ 1. the weight of the object being moved • ___ 2. an object that makes work easier • ___ 3. the force that pulls objects to the earth D E C effort friction gravity load machine motion

3. Complete each matching section • ___ 4. the force that causes an object to move • ___ 5. the force that resists the movements of objects against each other • ___ 6. a change in an objects position A B F effort friction gravity load machine motion

4. Complete each matching section • ___ 7. a flat, sloped surface • ___ 8. a wheel with a rod running through it • ___ 9. a bar that turns on a point G L H inclined plane lever pulley screw wedge wheel and axle

5. Complete each matching section K • ___ 10. one or more inclined planes used to force things apart • ___ 11. an inclined plan wound around an axle • ___ 12. a wheel with a grove that can hold a rope J I inclined plane lever pulley screw wedge wheel and axle

6. True or False T • ___ 13. A force is a push or a pull • ___ 14. Something moves when the forces acting on it become balanced. • ___ 15. a fulcrum is the point on which a lever turns. • ___ 16. Wheel and axles with “teeth” that work together are called pulleys. • ___ 17. Both fixed and movable pulleys are used in a block and tackle. F T F T