1. What type of simple machine is a screw? Inclined plane

2. When a screwdriver is used as a lever to open a paint can, what is changed as the work is done? Size and direction of input force

3. What is a device that makes work easier by changing the size or direction of force? machine

4. What is a machine with a grooved wheel that holds a cable? pulley

5. Which of the following is a compound machine? First class lever Wheel and axle Block and tackle pulley Screw

6. What is it called when a force causes an object to move in the direction of the force? work

7. If a book weighs 50 N, what other information do you need to calculate how much work is done when it is lifted? W = F x d….Distance

8. Where is the input force of a wheel and axle exerted? A circular distance

9. How does a ramp make lifting a heavy object easier? Less force is needed to move the object over a longer distance

10. Which of the following are simple machines used by the Egyptians to build pyramids? Inclined planes and levers Wheels and axles Screws and screwdrivers Plows and axes

11. Which of the following is NOT a wedge? Chisel Knife Plow Ramp

12. What is the work done BY an object? Work output

13. A doorknob is an example of a Wheel and axle

14. What is a machine that is made of two simple machines? Compound machine

15. Susie and Fred are lifting bags of fruit to put in a truck. Susie does 200 J of work in 5 minutes and Fred does 200 J of work in 3 minutes. What was the difference between the two jobs? The power! P = Work/time

16. What does a fixed pulley change? The direction of a force

17. James applies a force of 100 N to move a table 3 meters. How much work did he do? W= F x d W= 100N x 3 m W= 300J

18. If you unwind a screw, you would find that is actually a(n) Inclined plane

19. A _________lever places the load between the input force and the fulcrum. 2 nd class REMEMBER: What is in the MIDDLE of the lever? 1 st : Fulcrum 2 nd : Output Force 3 rd : Input Force

20. A _______pulley is attached to something so it does not move. fixed

21. After you exert a force on an object, it then moves and has __________energy. Kinetic

22. The mechanical advantage of a block and tackle pulley depends upon the number of _______ Rope segments

23. A lever where the fulcrum is between the input force and load: 1 st class Think see-saw

24. A lever where the load is between the input force and fulcrum 2 nd class (think…wheel barrow)

25. A pair of incline planes that move wedge

26. A machine that consists of 2 circular objects of different sizes Wheel and axle

27. A machine that is a straight, slanted surface Inclined plane

28. A machine that has a bar that pivots at a fixed point lever

29. A machine with a grooved wheel holding a rope pulley

30. A lever where the input force is between the fulcrum and the load 3 rd Think….hammer hammering a nail

31. A fixed point on a lever fulcrum

32. Unit for Power Watt

33. Unit for Work Joule

34. What is difference between 3 classes of levers? Where output force is

35. What type simple machine would Reggie be using if he was trying to get a nail out of a piece of lumber? 1 st class….fulcrum at end!