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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 716 · 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 190 N did 950 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 290 N pushes a cart 10 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  7. 7.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 270 N did 1350 J of work. How many metres did the object move?
  11. 11.🏋️ Pushing a crate 10 m took 100 J of work. What force was used, in newtons?
  12. 12.🏋️ A 14 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ Pushing a crate 2 m took 660 J of work. What force was used, in newtons?
  14. 14.🏋️ Pushing a crate 2 m took 800 J of work. What force was used, in newtons?
  15. 15.🏋️ Pushing a crate 8 m took 2640 J of work. What force was used, in newtons?
  16. 16.🏋️ Pushing a crate 8 m took 2000 J of work. What force was used, in newtons?
  17. 17.🏋️ Pushing a crate 10 m took 3500 J of work. What force was used, in newtons?
  18. 18.🏋️ Pushing a crate 10 m took 700 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 20 N pushes a cart 4 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 90 N did 360 J of work. How many metres did the object move?
  21. 21.🏋️ Pushing a crate 4 m took 80 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 410 N did 2460 J of work. How many metres did the object move?
  23. 23.🏋️ 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?
  24. 24.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  25. 25.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) load × effort (d) effort ÷ load
  27. 27.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  28. 28.🏋️ An 8 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.🏋️ A force of 460 N did 920 J of work. How many metres did the object move?
  30. 30.🏋️ 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?
  31. 31.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ Pushing a crate 2 m took 280 J of work. What force was used, in newtons?
  33. 33.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ 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?
  35. 35.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 110 N did 440 J of work. How many metres did the object move?
  37. 37.🏋️ Pushing a crate 2 m took 100 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 10 N did 20 J of work. How many metres did the object move?
  39. 39.🏋️ Pushing a crate 3 m took 1230 J of work. What force was used, in newtons?
  40. 40.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?

Answer key

  1. 5
  2. 2900
  3. 300
  4. 950
  5. 6
  6. joule (J)
  7. 80
  8. 750
  9. 700
  10. 5
  11. 10
  12. 140
  13. 330
  14. 400
  15. 330
  16. 250
  17. 350
  18. 70
  19. 80
  20. 4
  21. 20
  22. 6
  23. 340
  24. through a distance
  25. 700
  26. load ÷ effort
  27. less effort
  28. 320
  29. 2
  30. 210
  31. 2
  32. 140
  33. 500
  34. 200
  35. 250
  36. 4
  37. 50
  38. 2
  39. 410
  40. 6

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