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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 12 · 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 140 N did 700 J of work. How many metres did the object move?
  2. 2.🏋️ Pushing a crate 7 m took 630 J of work. What force was used, in newtons?
  3. 3.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Pushing a crate 3 m took 1410 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 10 N did 10 J of work. How many metres did the object move?
  6. 6.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A 5 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ Pushing a crate 1 m took 410 J of work. What force was used, in newtons?
  9. 9.🏋️ Pushing a crate 3 m took 1110 J of work. What force was used, in newtons?
  10. 10.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  12. 12.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
  13. 13.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A force of 420 N pushes a cart 4 m along the floor. How much work is done, in joules?
  16. 16.🏋️ Pushing a crate 8 m took 2800 J of work. What force was used, in newtons?
  17. 17.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  18. 18.🏋️ Pushing a crate 9 m took 900 J of work. What force was used, in newtons?
  19. 19.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ Pushing a crate 8 m took 1120 J of work. What force was used, in newtons?
  21. 21.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  23. 23.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ 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?
  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 machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ Pushing a crate 10 m took 3400 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 420 N did 4200 J of work. How many metres did the object move?
  30. 30.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 240 N did 2400 J of work. How many metres did the object move?
  33. 33.🏋️ 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?
  34. 34.🏋️ Pushing a crate 1 m took 90 J of work. What force was used, in newtons?
  35. 35.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ Pushing a crate 6 m took 1800 J of work. What force was used, in newtons?
  38. 38.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ Pushing a crate 1 m took 60 J of work. What force was used, in newtons?
  40. 40.🏋️ Pushing a crate 2 m took 580 J of work. What force was used, in newtons?

Answer key

  1. 5
  2. 90
  3. 4
  4. 470
  5. 1
  6. 650
  7. 200
  8. 410
  9. 370
  10. 2
  11. joule (J)
  12. through a distance
  13. 5
  14. 720
  15. 1680
  16. 350
  17. less effort
  18. 100
  19. 3
  20. 140
  21. 120
  22. load ÷ effort
  23. 800
  24. 100
  25. 850
  26. 300
  27. 6
  28. 340
  29. 10
  30. 100
  31. 50
  32. 10
  33. 40
  34. 90
  35. 80
  36. 5
  37. 300
  38. 100
  39. 60
  40. 290

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