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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 609 · 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 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?
  2. 2.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ Pushing a crate 3 m took 600 J of work. What force was used, in newtons?
  4. 4.🏋️ A force of 500 N pushes a cart 7 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 420 N pushes a cart 7 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A force of 300 N did 1800 J of work. How many metres did the object move?
  7. 7.🏋️ A force of 450 N did 2700 J of work. How many metres did the object move?
  8. 8.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
  12. 12.🏋️ A force of 80 N did 320 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 480 N did 480 J of work. How many metres did the object move?
  14. 14.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A 3 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A force of 130 N did 260 J of work. How many metres did the object move?
  17. 17.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ Pushing a crate 10 m took 3700 J of work. What force was used, in newtons?
  19. 19.🏋️ Pushing a crate 8 m took 640 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 480 N did 1920 J of work. How many metres did the object move?
  21. 21.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ Pushing a crate 3 m took 1230 J of work. What force was used, in newtons?
  24. 24.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  25. 25.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
  27. 27.🏋️ A 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ Pushing a crate 3 m took 270 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 7 m took 3220 J of work. What force was used, in newtons?
  30. 30.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
  31. 31.🏋️ 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)
  32. 32.🏋️ A force of 50 N did 50 J of work. How many metres did the object move?
  33. 33.🏋️ 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?
  34. 34.🏋️ A force of 230 N pushes a cart 2 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ Pushing a crate 8 m took 2720 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 250 N did 1750 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 430 N did 2150 J of work. How many metres did the object move?
  39. 39.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 510
  2. 800
  3. 200
  4. 3500
  5. 2940
  6. 6
  7. 6
  8. 450
  9. 3
  10. 3
  11. joule (J)
  12. 4
  13. 1
  14. 5
  15. 60
  16. 2
  17. 4
  18. 370
  19. 80
  20. 4
  21. 5
  22. 550
  23. 410
  24. through a distance
  25. 2
  26. load ÷ effort
  27. 240
  28. 90
  29. 460
  30. less effort
  31. 800
  32. 1
  33. 140
  34. 460
  35. 120
  36. 340
  37. 7
  38. 5
  39. 200
  40. 100

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