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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 627 · 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.🏋️ Pushing a crate 3 m took 1230 J of work. What force was used, in newtons?
  2. 2.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
  3. 3.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
  4. 4.🏋️ A force of 360 N did 1800 J of work. How many metres did the object move?
  5. 5.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A force of 180 N did 900 J of work. How many metres did the object move?
  7. 7.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  9. 9.🏋️ A force of 50 N did 200 J of work. How many metres did the object move?
  10. 10.🏋️ A 20 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 force of 350 N did 1050 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 150 N did 450 J of work. How many metres did the object move?
  13. 13.🏋️ Pushing a crate 5 m took 1100 J of work. What force was used, in newtons?
  14. 14.🏋️ Pushing a crate 1 m took 150 J of work. What force was used, in newtons?
  15. 15.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A force of 220 N pushes a cart 4 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 200 N pushes a cart 5 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 130 N did 780 J of work. How many metres did the object move?
  19. 19.🏋️ A 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ 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?
  21. 21.🏋️ A force of 390 N did 3120 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 140 N pushes a cart 8 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 110 N pushes a cart 2 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ Pushing a crate 4 m took 1200 J of work. What force was used, in newtons?
  26. 26.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ Pushing a crate 9 m took 450 J of work. What force was used, in newtons?
  28. 28.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 30 N pushes a cart 5 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, always (d) yes, by half
  31. 31.🏋️ A 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 330 N did 660 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 460 N pushes a cart 1 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
  35. 35.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ 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?
  37. 37.🏋️ A force of 110 N did 770 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 420 N did 2100 J of work. How many metres did the object move?
  39. 39.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?

Answer key

  1. 410
  2. load ÷ effort
  3. joule (J)
  4. 5
  5. 150
  6. 5
  7. 6
  8. through a distance
  9. 4
  10. 200
  11. 3
  12. 3
  13. 220
  14. 150
  15. 110
  16. 880
  17. 1000
  18. 6
  19. 150
  20. 240
  21. 8
  22. 1120
  23. 220
  24. 400
  25. 300
  26. 400
  27. 50
  28. 5
  29. 150
  30. no, work stays the same
  31. 640
  32. 2
  33. 460
  34. less effort
  35. 650
  36. 100
  37. 7
  38. 5
  39. 700
  40. 3

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