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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 28 · 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.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) only on Mondays (d) yes, by half
  4. 4.🏋️ A force of 440 N pushes a cart 9 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ Pushing a crate 7 m took 560 J of work. What force was used, in newtons?
  7. 7.🏋️ Pushing a crate 7 m took 1400 J of work. What force was used, in newtons?
  8. 8.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  9. 9.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ Pushing a crate 10 m took 1300 J of work. What force was used, in newtons?
  11. 11.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  12. 12.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  13. 13.🏋️ Pushing a crate 3 m took 1350 J of work. What force was used, in newtons?
  14. 14.🏋️ Pushing a crate 1 m took 240 J of work. What force was used, in newtons?
  15. 15.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ 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?
  20. 20.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ Pushing a crate 3 m took 1320 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 350 N did 3500 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 430 N did 430 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 100 N did 300 J of work. How many metres did the object move?
  25. 25.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ Pushing a crate 3 m took 60 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 7 m took 1960 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 310 N pushes a cart 5 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Pushing a crate 10 m took 2600 J of work. What force was used, in newtons?
  30. 30.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ 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?
  33. 33.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 490 N did 4410 J of work. How many metres did the object move?
  36. 36.🏋️ Pushing a crate 2 m took 60 J of work. What force was used, in newtons?
  37. 37.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ Pushing a crate 9 m took 3960 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 40 N pushes a cart 7 m along the floor. How much work is done, in joules?
  40. 40.🏋️ Pushing a crate 2 m took 240 J of work. What force was used, in newtons?

Answer key

  1. 330
  2. 5
  3. no, work stays the same
  4. 3960
  5. 120
  6. 80
  7. 200
  8. less effort
  9. 200
  10. 130
  11. through a distance
  12. joule (J)
  13. 450
  14. 240
  15. 6
  16. 300
  17. 3
  18. 700
  19. 150
  20. 6
  21. 440
  22. 10
  23. 1
  24. 3
  25. 850
  26. 20
  27. 280
  28. 1550
  29. 260
  30. 4
  31. 5
  32. 120
  33. 3
  34. 600
  35. 9
  36. 30
  37. 100
  38. 440
  39. 280
  40. 120

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