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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 838 · 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 force of 150 N did 750 J of work. How many metres did the object move?
  2. 2.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
  5. 5.🏋️ Pushing a crate 5 m took 300 J of work. What force was used, in newtons?
  6. 6.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ 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?
  8. 8.🏋️ Pushing a crate 10 m took 4400 J of work. What force was used, in newtons?
  9. 9.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  11. 11.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ Pushing a crate 9 m took 2790 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 70 N did 560 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 180 N did 1440 J of work. How many metres did the object move?
  16. 16.🏋️ 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
  17. 17.🏋️ A force of 460 N pushes a cart 2 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A force of 290 N did 870 J of work. How many metres did the object move?
  20. 20.🏋️ A 3 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) newton (N) (d) metre (m)
  22. 22.🏋️ A force of 30 N pushes a cart 4 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 100 N pushes a cart 7 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A force of 290 N pushes a cart 1 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 4 m took 440 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 370 N pushes a cart 8 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 10 N did 100 J of work. How many metres did the object move?
  32. 32.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  33. 33.🏋️ A force of 400 N pushes a cart 9 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 6 m took 2280 J of work. What force was used, in newtons?
  35. 35.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ Pushing a crate 7 m took 490 J of work. What force was used, in newtons?
  37. 37.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ Pushing a crate 3 m took 60 J of work. What force was used, in newtons?
  40. 40.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 5
  2. 2
  3. 900
  4. load ÷ effort
  5. 60
  6. 2
  7. 120
  8. 440
  9. 4
  10. less effort
  11. 10
  12. 240
  13. 310
  14. 8
  15. 8
  16. no, work stays the same
  17. 920
  18. 300
  19. 3
  20. 60
  21. joule (J)
  22. 120
  23. 700
  24. 3
  25. 40
  26. 290
  27. 5
  28. 3
  29. 110
  30. 2960
  31. 10
  32. through a distance
  33. 3600
  34. 380
  35. 500
  36. 70
  37. 450
  38. 550
  39. 20
  40. 150

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