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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 242 · 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 8 m took 3840 J of work. What force was used, in newtons?
  2. 2.🏋️ A force of 210 N pushes a cart 2 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 490 N did 4900 J of work. How many metres did the object move?
  4. 4.🏋️ A force of 470 N pushes a cart 1 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  6. 6.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 430 N pushes a cart 9 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Pushing a crate 7 m took 980 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 40 N pushes a cart 6 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 350 N pushes a cart 5 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Pushing a crate 6 m took 2040 J of work. What force was used, in newtons?
  13. 13.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) watt hour (d) metre (m)
  14. 14.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A force of 20 N did 40 J of work. How many metres did the object move?
  16. 16.🏋️ Pushing a crate 2 m took 240 J of work. What force was used, in newtons?
  17. 17.🏋️ Pushing a crate 8 m took 3120 J of work. What force was used, in newtons?
  18. 18.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) no, work stays the same (d) only on Mondays
  19. 19.🏋️ Pushing a crate 2 m took 500 J of work. What force was used, in newtons?
  20. 20.🏋️ Pushing a crate 2 m took 620 J of work. What force was used, in newtons?
  21. 21.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A force of 330 N did 1650 J of work. How many metres did the object move?
  23. 23.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) more effort (d) the same effort
  24. 24.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  25. 25.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A force of 200 N did 1000 J of work. How many metres did the object move?
  27. 27.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A force of 250 N did 2500 J of work. How many metres did the object move?
  29. 29.🏋️ Pushing a crate 9 m took 4230 J of work. What force was used, in newtons?
  30. 30.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ Pushing a crate 10 m took 4400 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 150 N pushes a cart 4 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  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.🏋️ Pushing a crate 9 m took 810 J of work. What force was used, in newtons?
  36. 36.🏋️ Pushing a crate 10 m took 1700 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 460 N pushes a cart 3 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 300 N did 2100 J of work. How many metres did the object move?
  39. 39.🏋️ Pushing a crate 8 m took 640 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 250 N did 2000 J of work. How many metres did the object move?

Answer key

  1. 480
  2. 420
  3. 10
  4. 470
  5. through a distance
  6. 4
  7. 3870
  8. 4
  9. 140
  10. 240
  11. 1750
  12. 340
  13. joule (J)
  14. 550
  15. 2
  16. 120
  17. 390
  18. no, work stays the same
  19. 250
  20. 310
  21. 750
  22. 5
  23. less effort
  24. load ÷ effort
  25. 6
  26. 5
  27. 5
  28. 10
  29. 470
  30. 550
  31. 440
  32. 600
  33. 6
  34. 200
  35. 90
  36. 170
  37. 1380
  38. 7
  39. 80
  40. 8

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