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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 879 · 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 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?
  2. 2.🏋️ A force of 360 N did 2520 J of work. How many metres did the object move?
  3. 3.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ 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?
  5. 5.🏋️ Pushing a crate 5 m took 2300 J of work. What force was used, in newtons?
  6. 6.🏋️ Pushing a crate 3 m took 1230 J of work. What force was used, in newtons?
  7. 7.🏋️ Pushing a crate 6 m took 960 J of work. What force was used, in newtons?
  8. 8.🏋️ Pushing a crate 8 m took 1200 J of work. What force was used, in newtons?
  9. 9.🏋️ 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)
  10. 10.🏋️ Pushing a crate 7 m took 2730 J of work. What force was used, in newtons?
  11. 11.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) the same effort (d) no effort
  12. 12.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 490 N did 2450 J of work. How many metres did the object move?
  14. 14.🏋️ An 18 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 smooth ramp is 12 m long and rises 2 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A force of 150 N did 900 J of work. How many metres did the object move?
  17. 17.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  18. 18.🏋️ Pushing a crate 7 m took 3220 J of work. What force was used, in newtons?
  19. 19.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ Pushing a crate 10 m took 1300 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 50 N did 150 J of work. How many metres did the object move?
  23. 23.🏋️ Pushing a crate 7 m took 840 J of work. What force was used, in newtons?
  24. 24.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  25. 25.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ Pushing a crate 1 m took 60 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 420 N did 4200 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 460 N pushes a cart 10 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 260 N pushes a cart 1 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 1 m took 270 J of work. What force was used, in newtons?
  31. 31.🏋️ Pushing a crate 1 m took 360 J of work. What force was used, in newtons?
  32. 32.🏋️ Pushing a crate 6 m took 1500 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 250 N did 2500 J of work. How many metres did the object move?
  34. 34.🏋️ Pushing a crate 1 m took 260 J of work. What force was used, in newtons?
  35. 35.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A force of 40 N did 320 J of work. How many metres did the object move?
  37. 37.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) load × effort (d) effort ÷ load
  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.🏋️ Pushing a crate 10 m took 700 J of work. What force was used, in newtons?
  40. 40.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 100
  2. 7
  3. 50
  4. 550
  5. 460
  6. 410
  7. 160
  8. 150
  9. 50
  10. 390
  11. less effort
  12. 2
  13. 5
  14. 900
  15. 600
  16. 6
  17. no, work stays the same
  18. 460
  19. 50
  20. 300
  21. 130
  22. 3
  23. 120
  24. through a distance
  25. 1000
  26. 60
  27. 10
  28. 4600
  29. 260
  30. 270
  31. 360
  32. 250
  33. 10
  34. 260
  35. 120
  36. 8
  37. load ÷ effort
  38. 320
  39. 70
  40. 50

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