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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 341 · 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 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A force of 380 N did 760 J of work. How many metres did the object move?
  3. 3.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 470 N did 3760 J of work. How many metres did the object move?
  5. 5.🏋️ Pushing a crate 1 m took 90 J of work. What force was used, in newtons?
  6. 6.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
  7. 7.🏋️ A force of 450 N did 4500 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 130 N did 260 J of work. How many metres did the object move?
  9. 9.🏋️ A force of 460 N pushes a cart 8 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Pushing a crate 6 m took 1440 J of work. What force was used, in newtons?
  11. 11.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) load + effort (d) effort ÷ load
  12. 12.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ Pushing a crate 10 m took 4700 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 220 N pushes a cart 10 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  16. 16.🏋️ A force of 390 N pushes a cart 7 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A force of 40 N pushes a cart 1 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 160 N did 1280 J of work. How many metres did the object move?
  22. 22.🏋️ Pushing a crate 7 m took 1260 J of work. What force was used, in newtons?
  23. 23.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
  24. 24.🏋️ Pushing a crate 10 m took 3300 J of work. What force was used, in newtons?
  25. 25.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A 7 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ Pushing a crate 9 m took 720 J of work. What force was used, in newtons?
  32. 32.🏋️ Pushing a crate 10 m took 4800 J of work. What force was used, in newtons?
  33. 33.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ Pushing a crate 7 m took 700 J of work. What force was used, in newtons?
  35. 35.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  37. 37.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A 1 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?

Answer key

  1. 680
  2. 2
  3. 6
  4. 8
  5. 90
  6. less effort
  7. 10
  8. 2
  9. 3680
  10. 240
  11. load ÷ effort
  12. 5
  13. 470
  14. 2200
  15. through a distance
  16. 2730
  17. 20
  18. 540
  19. 300
  20. 40
  21. 8
  22. 180
  23. no, work stays the same
  24. 330
  25. 3
  26. 50
  27. 210
  28. 950
  29. 180
  30. 150
  31. 80
  32. 480
  33. 6
  34. 100
  35. 3
  36. joule (J)
  37. 400
  38. 30
  39. 2
  40. 4

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