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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 374 · 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.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 380 N pushes a cart 1 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ Pushing a crate 10 m took 2500 J of work. What force was used, in newtons?
  5. 5.🏋️ Pushing a crate 5 m took 1750 J of work. What force was used, in newtons?
  6. 6.🏋️ A force of 60 N did 180 J of work. How many metres did the object move?
  7. 7.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A force of 120 N pushes a cart 8 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
  10. 10.🏋️ A force of 290 N did 870 J of work. How many metres did the object move?
  11. 11.🏋️ A 16 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) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
  13. 13.🏋️ A force of 380 N did 3420 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 470 N pushes a cart 5 m along the floor. How much work is done, in joules?
  15. 15.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) the same effort (d) no effort
  17. 17.🏋️ A force of 460 N pushes a cart 1 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 230 N pushes a cart 4 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) load × effort (d) effort ÷ load
  20. 20.🏋️ A force of 400 N pushes a cart 4 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 1 m took 120 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 3 m took 900 J of work. What force was used, in newtons?
  23. 23.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A force of 20 N pushes a cart 9 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 430 N did 3870 J of work. How many metres did the object move?
  28. 28.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 5 m took 2350 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 410 N did 2870 J of work. How many metres did the object move?
  31. 31.🏋️ Pushing a crate 5 m took 350 J of work. What force was used, in newtons?
  32. 32.🏋️ 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?
  33. 33.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ Pushing a crate 2 m took 400 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 50 N pushes a cart 5 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Pushing a crate 2 m took 600 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 420 N did 1680 J of work. How many metres did the object move?
  39. 39.🏋️ 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?
  40. 40.🏋️ A force of 440 N pushes a cart 2 m along the floor. How much work is done, in joules?

Answer key

  1. 6
  2. 380
  3. 600
  4. 250
  5. 350
  6. 3
  7. 5
  8. 960
  9. through a distance
  10. 3
  11. 160
  12. no, work stays the same
  13. 9
  14. 2350
  15. 900
  16. less effort
  17. 460
  18. 920
  19. load ÷ effort
  20. 1600
  21. 120
  22. 300
  23. 5
  24. 600
  25. 4
  26. 180
  27. 9
  28. 2
  29. 470
  30. 7
  31. 70
  32. 160
  33. 570
  34. 510
  35. 200
  36. 250
  37. 300
  38. 4
  39. 950
  40. 880

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