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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 655 · 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.

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  1. 1.🏋️ 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?
  2. 2.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) without moving it (d) very slowly
  4. 4.🏋️ Pushing a crate 1 m took 400 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 180 N did 360 J of work. How many metres did the object move?
  6. 6.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A force of 80 N pushes a cart 7 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
  10. 10.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  12. 12.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ 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)
  15. 15.🏋️ A force of 420 N pushes a cart 4 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ Pushing a crate 4 m took 440 J of work. What force was used, in newtons?
  20. 20.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ Pushing a crate 10 m took 200 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 230 N pushes a cart 4 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 330 N pushes a cart 7 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 380 N did 3800 J of work. How many metres did the object move?
  26. 26.🏋️ A force of 150 N pushes a cart 1 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 130 N did 390 J of work. How many metres did the object move?
  28. 28.🏋️ 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?
  29. 29.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) more effort (d) the same effort
  31. 31.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ Pushing a crate 4 m took 560 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 1 m took 230 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 360 N did 3240 J of work. How many metres did the object move?
  36. 36.🏋️ A 14 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ Pushing a crate 1 m took 290 J of work. What force was used, in newtons?
  38. 38.🏋️ Pushing a crate 2 m took 880 J of work. What force was used, in newtons?
  39. 39.🏋️ 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?
  40. 40.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 110
  2. 2
  3. through a distance
  4. 400
  5. 2
  6. 150
  7. 6
  8. 560
  9. load ÷ effort
  10. 100
  11. joule (J)
  12. 3
  13. 150
  14. 950
  15. 1680
  16. 3
  17. 6
  18. 2
  19. 110
  20. 3
  21. 70
  22. 20
  23. 920
  24. 2310
  25. 10
  26. 150
  27. 3
  28. 320
  29. 5
  30. less effort
  31. 5
  32. 2
  33. 140
  34. 230
  35. 9
  36. 140
  37. 290
  38. 440
  39. 510
  40. 1000

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