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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 103 · 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 100 N did 1000 J of work. How many metres did the object move?
  2. 2.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ Pushing a crate 2 m took 220 J of work. What force was used, in newtons?
  4. 4.🏋️ Pushing a crate 2 m took 860 J of work. What force was used, in newtons?
  5. 5.🏋️ 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?
  6. 6.🏋️ A force of 120 N pushes a cart 6 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  9. 9.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) yes, by half (d) only on Mondays
  10. 10.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
  11. 11.🏋️ A force of 390 N pushes a cart 1 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 260 N pushes a cart 5 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A force of 320 N pushes a cart 3 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A force of 470 N did 2820 J of work. How many metres did the object move?
  17. 17.🏋️ 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?
  18. 18.🏋️ Pushing a crate 3 m took 1260 J of work. What force was used, in newtons?
  19. 19.🏋️ A 13 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A force of 470 N did 4230 J of work. How many metres did the object move?
  21. 21.🏋️ A force of 450 N pushes a cart 9 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A force of 90 N did 90 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 270 N pushes a cart 1 m along the floor. How much work is done, in joules?
  26. 26.🏋️ An 8 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.🏋️ Pushing a crate 1 m took 280 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 80 N pushes a cart 10 m along the floor. How much work is done, in joules?
  29. 29.🏋️ 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)
  30. 30.🏋️ 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?
  31. 31.🏋️ A force of 500 N pushes a cart 7 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Pushing a crate 7 m took 700 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 30 N did 270 J of work. How many metres did the object move?
  34. 34.🏋️ Pushing a crate 7 m took 1960 J of work. What force was used, in newtons?
  35. 35.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
  36. 36.🏋️ A force of 350 N did 2800 J of work. How many metres did the object move?
  37. 37.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  38. 38.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ Pushing a crate 8 m took 400 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 420 N did 420 J of work. How many metres did the object move?

Answer key

  1. 10
  2. 2
  3. 110
  4. 430
  5. 640
  6. 720
  7. 6
  8. less effort
  9. no, work stays the same
  10. load ÷ effort
  11. 390
  12. 1300
  13. 5
  14. 960
  15. 60
  16. 6
  17. 510
  18. 420
  19. 260
  20. 9
  21. 4050
  22. 300
  23. 3
  24. 1
  25. 270
  26. 160
  27. 280
  28. 800
  29. 50
  30. 110
  31. 3500
  32. 100
  33. 9
  34. 280
  35. through a distance
  36. 8
  37. joule (J)
  38. 600
  39. 50
  40. 1

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