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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 576 · 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 60 N did 180 J of work. How many metres did the object move?
  2. 2.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
  3. 3.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 450 N pushes a cart 1 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Pushing a crate 10 m took 3200 J of work. What force was used, in newtons?
  6. 6.🏋️ 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?
  7. 7.🏋️ A force of 80 N did 320 J of work. How many metres did the object move?
  8. 8.🏋️ Pushing a crate 8 m took 2560 J of work. What force was used, in newtons?
  9. 9.🏋️ A force of 390 N did 3510 J of work. How many metres did the object move?
  10. 10.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ Pushing a crate 4 m took 400 J of work. What force was used, in newtons?
  12. 12.🏋️ Pushing a crate 7 m took 980 J of work. What force was used, in newtons?
  13. 13.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 490 N pushes a cart 10 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ Pushing a crate 2 m took 580 J of work. What force was used, in newtons?
  18. 18.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  19. 19.🏋️ A force of 470 N pushes a cart 4 m along the floor. How much work is done, in joules?
  20. 20.🏋️ Pushing a crate 1 m took 180 J of work. What force was used, in newtons?
  21. 21.🏋️ Pushing a crate 5 m took 400 J of work. What force was used, in newtons?
  22. 22.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 200 N did 1800 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 10 m took 1400 J of work. What force was used, in newtons?
  25. 25.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  26. 26.🏋️ Pushing a crate 5 m took 1950 J of work. What force was used, in newtons?
  27. 27.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  28. 28.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 500 N did 4000 J of work. How many metres did the object move?
  30. 30.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
  31. 31.🏋️ A 7 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.🏋️ A force of 260 N did 260 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 200 N pushes a cart 1 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 160 N pushes a cart 2 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 40 N pushes a cart 9 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 130 N pushes a cart 1 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 40 N did 200 J of work. How many metres did the object move?
  38. 38.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A 15 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.🏋️ Pushing a crate 1 m took 160 J of work. What force was used, in newtons?

Answer key

  1. 3
  2. joule (J)
  3. 6
  4. 450
  5. 320
  6. 80
  7. 4
  8. 320
  9. 9
  10. 250
  11. 100
  12. 140
  13. 160
  14. 550
  15. 4900
  16. 850
  17. 290
  18. through a distance
  19. 1880
  20. 180
  21. 80
  22. 2
  23. 9
  24. 140
  25. less effort
  26. 390
  27. load ÷ effort
  28. 2
  29. 8
  30. no, work stays the same
  31. 280
  32. 1
  33. 200
  34. 320
  35. 360
  36. 130
  37. 5
  38. 270
  39. 450
  40. 160

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