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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 771 · 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 560 J of work. What force was used, in newtons?
  2. 2.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  3. 3.🏋️ 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?
  4. 4.🏋️ A force of 500 N pushes a cart 3 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ Pushing a crate 8 m took 640 J of work. What force was used, in newtons?
  11. 11.🏋️ 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?
  12. 12.🏋️ Pushing a crate 2 m took 940 J of work. What force was used, in newtons?
  13. 13.🏋️ Pushing a crate 1 m took 100 J of work. What force was used, in newtons?
  14. 14.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  16. 16.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  17. 17.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
  21. 21.🏋️ A force of 170 N did 340 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 10 N pushes a cart 7 m along the floor. How much work is done, in joules?
  23. 23.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  24. 24.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ Pushing a crate 5 m took 2350 J of work. What force was used, in newtons?
  26. 26.🏋️ 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)
  27. 27.🏋️ Pushing a crate 10 m took 300 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 200 N pushes a cart 6 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 200 N did 600 J of work. How many metres did the object move?
  30. 30.🏋️ Pushing a crate 6 m took 660 J of work. What force was used, in newtons?
  31. 31.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ Pushing a crate 9 m took 1620 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 8 m took 160 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 10 m took 4600 J of work. What force was used, in newtons?
  36. 36.🏋️ Pushing a crate 4 m took 200 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 1 m took 90 J of work. What force was used, in newtons?
  38. 38.🏋️ A 16 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 force of 170 N pushes a cart 7 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 260 N did 1040 J of work. How many metres did the object move?

Answer key

  1. 70
  2. joule (J)
  3. 30
  4. 1500
  5. 950
  6. 4
  7. 6
  8. 720
  9. 450
  10. 80
  11. 150
  12. 470
  13. 100
  14. 2
  15. load ÷ effort
  16. no, work stays the same
  17. 1000
  18. 250
  19. 3
  20. less effort
  21. 2
  22. 70
  23. through a distance
  24. 550
  25. 470
  26. 300
  27. 30
  28. 1200
  29. 3
  30. 110
  31. 650
  32. 2
  33. 180
  34. 20
  35. 460
  36. 50
  37. 90
  38. 480
  39. 1190
  40. 4

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