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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 743 · 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 6 m took 2280 J of work. What force was used, in newtons?
  2. 2.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A force of 10 N pushes a cart 5 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 20 N did 200 J of work. How many metres did the object move?
  5. 5.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) yes, always (d) no, work stays the same
  6. 6.🏋️ An 11 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A force of 150 N pushes a cart 7 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A 5 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) less effort (d) the same effort
  10. 10.🏋️ Pushing a crate 9 m took 3420 J of work. What force was used, in newtons?
  11. 11.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) effort ÷ load (d) load + effort
  12. 12.🏋️ Pushing a crate 1 m took 490 J of work. What force was used, in newtons?
  13. 13.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
  14. 14.🏋️ Pushing a crate 1 m took 330 J of work. What force was used, in newtons?
  15. 15.🏋️ 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?
  16. 16.🏋️ A 13 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A force of 230 N pushes a cart 3 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 330 N did 660 J of work. How many metres did the object move?
  19. 19.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ Pushing a crate 9 m took 4140 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 380 N pushes a cart 2 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Pushing a crate 2 m took 580 J of work. What force was used, in newtons?
  23. 23.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 350 N pushes a cart 3 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 50 N did 300 J of work. How many metres did the object move?
  26. 26.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  29. 29.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ Pushing a crate 4 m took 480 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 80 N pushes a cart 1 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Pushing a crate 4 m took 1480 J of work. What force was used, in newtons?
  33. 33.🏋️ Pushing a crate 6 m took 840 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 8 m took 1360 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 80 N pushes a cart 8 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 270 N pushes a cart 4 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ Pushing a crate 1 m took 60 J of work. What force was used, in newtons?

Answer key

  1. 380
  2. 6
  3. 50
  4. 10
  5. no, work stays the same
  6. 220
  7. 1050
  8. 150
  9. less effort
  10. 380
  11. load ÷ effort
  12. 490
  13. through a distance
  14. 330
  15. 650
  16. 390
  17. 690
  18. 2
  19. 4
  20. 460
  21. 760
  22. 290
  23. 850
  24. 1050
  25. 6
  26. 190
  27. 6
  28. joule (J)
  29. 350
  30. 120
  31. 80
  32. 370
  33. 140
  34. 170
  35. 640
  36. 1080
  37. 550
  38. 320
  39. 6
  40. 60

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