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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 984 · 40 questions
TalentJR

Engineer's tip (Less force, more distance): MA = load ÷ effort. Work (J) = force (N) × distance (m); force = work ÷ distance; distance = work ÷ force. Ideal ramp: MA = length ÷ height, effort = load ÷ MA.

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  1. 1.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  2. 2.🏋️ Pushing a crate 8 m took 3360 J of work. What force was used, in newtons?
  3. 3.🏋️ Pushing a crate 5 m took 550 J of work. What force was used, in newtons?
  4. 4.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
  6. 6.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Pushing a crate 4 m took 2000 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 310 N pushes a cart 8 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ Pushing a crate 2 m took 740 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 430 N did 1720 J of work. How many metres did the object move?
  12. 12.🏋️ Pushing a crate 4 m took 960 J of work. What force was used, in newtons?
  13. 13.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ Pushing a crate 9 m took 3150 J of work. What force was used, in newtons?
  15. 15.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) only on Mondays (d) yes, always
  17. 17.🏋️ A 17 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ Pushing a crate 3 m took 690 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 140 N did 1260 J of work. How many metres did the object move?
  20. 20.🏋️ A force of 130 N pushes a cart 8 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  22. 22.🏋️ A force of 500 N did 3000 J of work. How many metres did the object move?
  23. 23.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A force of 350 N pushes a cart 8 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 460 N did 2300 J of work. How many metres did the object move?
  26. 26.🏋️ A 19 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 200 N pushes a cart 10 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ Pushing a crate 1 m took 330 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 5 m took 2500 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 280 N pushes a cart 3 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 20 N did 20 J of work. How many metres did the object move?
  33. 33.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A force of 110 N pushes a cart 1 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A 7 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A force of 180 N did 1800 J of work. How many metres did the object move?

Answer key

  1. joule (J)
  2. 420
  3. 110
  4. 600
  5. less effort
  6. 6
  7. 500
  8. 2480
  9. 200
  10. 370
  11. 4
  12. 240
  13. 400
  14. 350
  15. 3
  16. no, work stays the same
  17. 340
  18. 230
  19. 9
  20. 1040
  21. load ÷ effort
  22. 6
  23. 100
  24. 2800
  25. 5
  26. 950
  27. 2000
  28. 160
  29. 330
  30. 500
  31. 840
  32. 1
  33. 4
  34. 750
  35. 5
  36. 850
  37. 110
  38. 2
  39. 210
  40. 10

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