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Page 375, fig. 2

Page 375, fig. 2. Page 375, fig. 2. Page 374, fig. 1. Page 374, fig. 1. Page 375, fig. 3. Page 376. Page 376. Page 376. A hydraulic lift exerts a force of 12,000 N to lift a car 2 m. How much work is done on the car?.

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Page 375, fig. 2

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  1. Page 375, fig. 2

  2. Page 375, fig. 2

  3. Page 374, fig. 1

  4. Page 374, fig. 1

  5. Page 375, fig. 3

  6. Page 376

  7. Page 376

  8. Page 376

  9. A hydraulic lift exerts a force of 12,000 N to lift a car 2 m. How much work is done on the car?

  10. A hydraulic lift exerts a force of 12,000 N to lift a car 2 m. How much work is done on the car? W = F X D

  11. A hydraulic lift exerts a force of 12,000 N to lift a car 2 m. How much work is done on the car? W = F X D = 12,000 N X 2 m

  12. A hydraulic lift exerts a force of 12,000 N to lift a car 2 m. How much work is done on the car? W = F X D = 12,000 N X 2 m = 24,000 Nm

  13. A hydraulic lift exerts a force of 12,000 N to lift a car 2 m. How much work is done on the car? W = F X D = 12,000 N X 2 m = 24,000 Nm = 24,000 J

  14. You exert a force of 0.2 N to lift a pencil off the floor. How much work do you do if you lift it 1.5 m?

  15. You exert a force of 0.2 N to lift a pencil off the floor. How much work do you do if you lift it 1.5 m? W = F X D

  16. You exert a force of 0.2 N to lift a pencil off the floor. How much work do you do if you lift it 1.5 m? W = F X D = 0.2 N X 1.5 m

  17. You exert a force of 0.2 N to lift a pencil off the floor. How much work do you do if you lift it 1.5 m? W = F X D = 0.2 N X 1.5 m = 0.3 Nm

  18. You exert a force of 0.2 N to lift a pencil off the floor. How much work do you do if you lift it 1.5 m? W = F X D = 0.2 N X 1.5 m = 0.3 Nm = 0.3 J

  19. Page 377, fig. 4

  20. Page 378

  21. Page 378

  22. Page 378

  23. Page 379, fig. 5

  24. Page 379, fig. 5

  25. Page 379, fig. 6

  26. Page 380, fig. 7

  27. Page 381, fig. 8

  28. Page 381, fig. 8

  29. Page 380, fig. 7

  30. Page 382

  31. You cut the lawn with a hand mower. You do 250,000 J of work to move the mower. If the work done by the mower in cutting the lawn is 200,000 J, what is the efficiency of the mower? E = Wo Wi E = 200,000 J 250,000 J E = 0.8 X 100% = 80%

  32. You do 1,500 J of work using a hammer. The hammer does 825 J of work on a nail. What is the efficiency of the hammer? E = Wo Wi

  33. You do 1,500 J of work using a hammer. The hammer does 825 J of work on a nail. What is the efficiency of the hammer? E = Wo Wi E = 825 J 1,500 J

  34. You do 1,500 J of work using a hammer. The hammer does 825 J of work on a nail. What is the efficiency of the hammer? E = Wo Wi E = 825 J 1,500 J E = 0.55 X 100% = 55%

  35. Suppose you left your lawn mower outdoors all winter. It's now rusty. Of your 250,000 J of work, only 100,000 J go to cutting the lawn. What is the efficiency of the machine now? E = Wo Wi

  36. Suppose you left your lawn mower outdoors all winter. It's now rusty. Of your 250,000 J of work, only 100,000 J go to cutting the lawn. What is the efficiency of the machine now? E = Wo Wi E = 100,000 J 250,000 J

  37. Suppose you left your lawn mower outdoors all winter. It's now rusty. Of your 250,000 J of work, only 100,000 J go to cutting the lawn. What is the efficiency of the machine now? E = Wo Wi E = 100,000 J 250,000 J E = 0.4 X 100% = 40%

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