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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 849 · 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.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  2. 2.🏋️ A force of 330 N did 3300 J of work. How many metres did the object move?
  3. 3.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
  4. 4.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Pushing a crate 1 m took 390 J of work. What force was used, in newtons?
  6. 6.🏋️ A 14 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
  9. 9.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 200 N did 200 J of work. How many metres did the object move?
  11. 11.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ Pushing a crate 8 m took 3120 J of work. What force was used, in newtons?
  14. 14.🏋️ Pushing a crate 5 m took 1450 J of work. What force was used, in newtons?
  15. 15.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 280 N pushes a cart 8 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 500 N pushes a cart 6 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ Pushing a crate 8 m took 3520 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 490 N pushes a cart 7 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 4 m took 320 J of work. What force was used, in newtons?
  22. 22.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ Pushing a crate 10 m took 1900 J of work. What force was used, in newtons?
  26. 26.🏋️ Pushing a crate 8 m took 2320 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 220 N pushes a cart 8 m along the floor. How much work is done, in joules?
  28. 28.🏋️ 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?
  29. 29.🏋️ A 19 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  31. 31.🏋️ A 10 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ Pushing a crate 10 m took 2900 J of work. What force was used, in newtons?
  33. 33.🏋️ Pushing a crate 3 m took 660 J of work. What force was used, in newtons?
  34. 34.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  35. 35.🏋️ Pushing a crate 1 m took 370 J of work. What force was used, in newtons?
  36. 36.🏋️ Pushing a crate 7 m took 70 J of work. What force was used, in newtons?
  37. 37.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ Pushing a crate 3 m took 330 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 430 N did 860 J of work. How many metres did the object move?

Answer key

  1. joule (J)
  2. 10
  3. less effort
  4. 6
  5. 390
  6. 420
  7. 850
  8. no, work stays the same
  9. 4
  10. 1
  11. 100
  12. 5
  13. 390
  14. 290
  15. 3
  16. 2240
  17. 3000
  18. 2
  19. 440
  20. 3430
  21. 80
  22. 3
  23. 150
  24. 80
  25. 190
  26. 290
  27. 1760
  28. 120
  29. 760
  30. through a distance
  31. 400
  32. 290
  33. 220
  34. load ÷ effort
  35. 370
  36. 10
  37. 200
  38. 4
  39. 110
  40. 2

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