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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 836 · 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.

NameDateTime takenScore ___ / 40
  1. 1.🏋️ A force of 240 N pushes a cart 8 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 390 N pushes a cart 9 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A force of 280 N pushes a cart 8 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Pushing a crate 2 m took 360 J of work. What force was used, in newtons?
  6. 6.🏋️ A force of 80 N did 640 J of work. How many metres did the object move?
  7. 7.🏋️ A force of 10 N pushes a cart 5 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Pushing a crate 7 m took 3150 J of work. What force was used, in newtons?
  9. 9.🏋️ A 5 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.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) no, work stays the same (d) yes, by half
  13. 13.🏋️ A 4 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.🏋️ A force of 80 N pushes a cart 10 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 20 N did 40 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 100 N did 400 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 330 N pushes a cart 9 m along the floor. How much work is done, in joules?
  19. 19.🏋️ 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?
  20. 20.🏋️ A force of 20 N pushes a cart 4 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 10 N pushes a cart 9 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  23. 23.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ Pushing a crate 5 m took 850 J of work. What force was used, in newtons?
  25. 25.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A 15 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 330 N did 2970 J of work. How many metres did the object move?
  28. 28.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  29. 29.🏋️ A force of 10 N pushes a cart 10 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 9 m took 3780 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 430 N pushes a cart 9 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Pushing a crate 7 m took 420 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 460 N pushes a cart 3 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 110 N pushes a cart 4 m along the floor. How much work is done, in joules?
  36. 36.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  37. 37.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 10 N did 20 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 70 N pushes a cart 10 m along the floor. How much work is done, in joules?

Answer key

  1. 1920
  2. 3510
  3. 400
  4. 2240
  5. 180
  6. 8
  7. 50
  8. 450
  9. 50
  10. 20
  11. 40
  12. no, work stays the same
  13. 200
  14. 800
  15. 3
  16. 2
  17. 4
  18. 2970
  19. 850
  20. 80
  21. 90
  22. load ÷ effort
  23. 4
  24. 170
  25. 750
  26. 300
  27. 9
  28. less effort
  29. 100
  30. 420
  31. 3870
  32. 60
  33. 1380
  34. 6
  35. 440
  36. joule (J)
  37. 3
  38. 550
  39. 2
  40. 700

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