1. a bar, board, or circle that pivots about a fulcrum.

2. Lever

3. 2 circular objects of different sizes

4. Wheel & axle

5. grooved wheel that holds a rope and a load.

6. pulley

7. a straight slanted surface

8. Inclined plane

9. is an inclined plane wrapped in a spiral

10. Screw

11. double inclined plane that moves used to split things apart.

12. Wedges

13. The formula for work is?

14. Work = Force x distance Recall you must have both going in the same direction in order for work to be done.

15. The units for work is ___?

16. Joules

17. What is the formula for power?

18. Power = Work time or Power = Force x distance time

19. What is the unit for Power?

20. Watts Recall kilowatt is 1000 watts

21. Which would have the greatest wattage a 40 W, 60W, or 100 W lightbulb?

22. 100 Watt bulb

23. What is the definition of Power?

24. The rate at which work is done or how fast work is done.

25. What is efficiency?

26. How much of the work put into a machine is changed to useful work put out by a machine and is usually expressed as a percentage.

27. What is the formula for effeciency?

28. Efficiency = Wout x 100% Win

29. What is mechanical advantage?

30. MA tells you how many times a simple machine multiplies your effort force. It compares input force (FI) your effort with the output force (FO) done by the machine.

31. The formulas for MA are related to what 2 things?

32. We can use 2 other formulas to calculate Mechanical Advantage as well
We can use 2 other formulas to calculate Mechanical Advantage as well! MA = Fload MA = d effort ______ ______ Feffort d load If given forces If given distances

33. What is the force distance payoff ?

34. You will reduce the effort force put into a machine, but you will have to travel a greater distance.

35. What is the MA of this pulley?

36. MA = 4