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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 101 · 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.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) yes, always (d) no, work stays the same
  2. 2.🏋️ A force of 30 N pushes a cart 1 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 70 N pushes a cart 2 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 270 N pushes a cart 7 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 40 N did 200 J of work. How many metres did the object move?
  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.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
  8. 8.🏋️ A force of 200 N did 1400 J of work. How many metres did the object move?
  9. 9.🏋️ A force of 470 N pushes a cart 6 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A force of 360 N did 720 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 330 N pushes a cart 9 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 440 N pushes a cart 10 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
  17. 17.🏋️ Pushing a crate 7 m took 2730 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 170 N did 510 J of work. How many metres did the object move?
  19. 19.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ Pushing a crate 6 m took 2880 J of work. What force was used, in newtons?
  23. 23.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
  24. 24.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) watt hour (d) newton (N)
  25. 25.🏋️ Pushing a crate 8 m took 1040 J of work. What force was used, in newtons?
  26. 26.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 440 N pushes a cart 9 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 230 N pushes a cart 6 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 500 N pushes a cart 4 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 170 N did 1020 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 10 N pushes a cart 10 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 270 N pushes a cart 1 m along the floor. How much work is done, in joules?
  34. 34.🏋️ 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)
  35. 35.🏋️ A force of 100 N pushes a cart 9 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A 15 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 390 N pushes a cart 4 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A 12 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?

Answer key

  1. no, work stays the same
  2. 30
  3. 140
  4. 1890
  5. 5
  6. 80
  7. through a distance
  8. 7
  9. 2820
  10. 2
  11. 900
  12. 2
  13. 2970
  14. 4400
  15. 4
  16. load ÷ effort
  17. 390
  18. 3
  19. 750
  20. 6
  21. 650
  22. 480
  23. less effort
  24. joule (J)
  25. 130
  26. 250
  27. 3960
  28. 1380
  29. 2000
  30. 6
  31. 100
  32. 3
  33. 270
  34. 700
  35. 900
  36. 300
  37. 150
  38. 1560
  39. 480
  40. 3

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