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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 161 · 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.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ Pushing a crate 1 m took 500 J of work. What force was used, in newtons?
  3. 3.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  4. 4.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  5. 5.🏋️ A force of 360 N pushes a cart 10 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) no effort (d) more effort
  7. 7.🏋️ 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?
  8. 8.🏋️ A 5 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 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?
  10. 10.🏋️ Pushing a crate 9 m took 2250 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 300 N did 3000 J of work. How many metres did the object move?
  12. 12.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) only on Mondays (d) yes, always
  13. 13.🏋️ 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?
  14. 14.🏋️ A force of 460 N pushes a cart 8 m along the floor. How much work is done, in joules?
  15. 15.🏋️ 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?
  16. 16.🏋️ Pushing a crate 8 m took 1120 J of work. What force was used, in newtons?
  17. 17.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 280 N did 840 J of work. How many metres did the object move?
  19. 19.🏋️ Pushing a crate 5 m took 1750 J of work. What force was used, in newtons?
  20. 20.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A force of 170 N did 850 J of work. How many metres did the object move?
  22. 22.🏋️ Pushing a crate 4 m took 1400 J of work. What force was used, in newtons?
  23. 23.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 230 N pushes a cart 10 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 9 m took 1260 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 150 N pushes a cart 10 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 40 N did 120 J of work. How many metres did the object move?
  34. 34.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
  35. 35.🏋️ A force of 100 N pushes a cart 2 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 230 N did 1150 J of work. How many metres did the object move?
  37. 37.🏋️ Pushing a crate 10 m took 1100 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 180 N pushes a cart 6 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 140 N pushes a cart 1 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 5
  2. 500
  3. joule (J)
  4. through a distance
  5. 3600
  6. less effort
  7. 680
  8. 200
  9. 60
  10. 250
  11. 10
  12. no, work stays the same
  13. 900
  14. 3680
  15. 30
  16. 140
  17. 6
  18. 3
  19. 350
  20. 90
  21. 5
  22. 350
  23. 5
  24. 300
  25. 950
  26. 2300
  27. 240
  28. 2
  29. 140
  30. 1500
  31. 120
  32. 3
  33. 3
  34. load ÷ effort
  35. 200
  36. 5
  37. 110
  38. 1080
  39. 140
  40. 150

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