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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 468 · 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 50 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) no effort (d) the same effort
  3. 3.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
  4. 4.🏋️ Pushing a crate 2 m took 440 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 350 N did 350 J of work. How many metres did the object move?
  6. 6.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A 9 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.🏋️ Pushing a crate 4 m took 1720 J of work. What force was used, in newtons?
  9. 9.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 370 N did 2960 J of work. How many metres did the object move?
  11. 11.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ 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?
  13. 13.🏋️ A force of 420 N did 1680 J of work. How many metres did the object move?
  14. 14.🏋️ Pushing a crate 5 m took 400 J of work. What force was used, in newtons?
  15. 15.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  16. 16.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ Pushing a crate 1 m took 370 J of work. What force was used, in newtons?
  20. 20.🏋️ An 18 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.🏋️ A force of 410 N pushes a cart 5 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
  24. 24.🏋️ A force of 440 N did 3080 J of work. How many metres did the object move?
  25. 25.🏋️ 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)
  26. 26.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  27. 27.🏋️ Pushing a crate 6 m took 1920 J of work. What force was used, in newtons?
  28. 28.🏋️ 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)
  29. 29.🏋️ A force of 410 N pushes a cart 10 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 340 N did 2720 J of work. How many metres did the object move?
  31. 31.🏋️ A 17 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 force of 50 N pushes a cart 4 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ Pushing a crate 5 m took 2500 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 1 m took 360 J of work. What force was used, in newtons?
  36. 36.🏋️ Pushing a crate 7 m took 1050 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 500 N did 4500 J of work. How many metres did the object move?
  38. 38.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 260 N did 1300 J of work. How many metres did the object move?
  40. 40.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?

Answer key

  1. 2
  2. less effort
  3. joule (J)
  4. 220
  5. 1
  6. 6
  7. 450
  8. 430
  9. 5
  10. 8
  11. 850
  12. 680
  13. 4
  14. 80
  15. through a distance
  16. 150
  17. 550
  18. 540
  19. 370
  20. 360
  21. 2050
  22. 6
  23. no, work stays the same
  24. 7
  25. 150
  26. load ÷ effort
  27. 320
  28. 250
  29. 4100
  30. 8
  31. 510
  32. 200
  33. 250
  34. 500
  35. 360
  36. 150
  37. 9
  38. 2
  39. 5
  40. 4

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