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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 491 · 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 machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 440 N pushes a cart 2 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 260 N did 1560 J of work. How many metres did the object move?
  4. 4.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) load × effort (d) effort ÷ load
  5. 5.🏋️ A force of 40 N did 400 J of work. How many metres did the object move?
  6. 6.🏋️ A 3 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ Pushing a crate 10 m took 1000 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 60 N pushes a cart 8 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Pushing a crate 7 m took 1750 J of work. What force was used, in newtons?
  10. 10.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
  12. 12.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) yes, by half (d) only on Mondays
  13. 13.🏋️ Pushing a crate 9 m took 2880 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 280 N pushes a cart 2 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A force of 140 N pushes a cart 9 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A force of 130 N pushes a cart 3 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 210 N pushes a cart 1 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A 14 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ Pushing a crate 6 m took 1680 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 9 m took 3690 J of work. What force was used, in newtons?
  23. 23.🏋️ Pushing a crate 3 m took 90 J of work. What force was used, in newtons?
  24. 24.🏋️ 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?
  25. 25.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ Pushing a crate 10 m took 3100 J of work. What force was used, in newtons?
  28. 28.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 10 m took 900 J of work. What force was used, in newtons?
  30. 30.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) watt hour (d) metre (m)
  32. 32.🏋️ Pushing a crate 9 m took 3960 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 150 N did 450 J of work. How many metres did the object move?
  34. 34.🏋️ A machine lifts a load of 480 N when you push with 120 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A force of 10 N did 40 J of work. How many metres did the object move?
  38. 38.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 500 N did 3500 J of work. How many metres did the object move?

Answer key

  1. 6
  2. 880
  3. 6
  4. load ÷ effort
  5. 10
  6. 30
  7. 100
  8. 480
  9. 250
  10. 4
  11. less effort
  12. no, work stays the same
  13. 320
  14. 560
  15. 1260
  16. 570
  17. 390
  18. 210
  19. 6
  20. 140
  21. 280
  22. 410
  23. 30
  24. 100
  25. 5
  26. 5
  27. 310
  28. 3
  29. 90
  30. 650
  31. joule (J)
  32. 440
  33. 3
  34. 4
  35. 6
  36. 950
  37. 4
  38. 3
  39. 2
  40. 7

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