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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 564 · 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 80 N did 560 J of work. How many metres did the object move?
  2. 2.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
  4. 4.🏋️ A 5 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
  6. 6.🏋️ Pushing a crate 5 m took 1450 J of work. What force was used, in newtons?
  7. 7.🏋️ A machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A force of 460 N pushes a cart 5 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 170 N pushes a cart 5 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) only on Mondays (d) yes, by half
  11. 11.🏋️ A force of 390 N did 780 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 490 N did 2940 J of work. How many metres did the object move?
  13. 13.🏋️ Pushing a crate 7 m took 2590 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 230 N pushes a cart 7 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  16. 16.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 440 N pushes a cart 3 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 500 N pushes a cart 4 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A force of 350 N did 1750 J of work. How many metres did the object move?
  22. 22.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ Pushing a crate 7 m took 280 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 4 m took 1920 J of work. What force was used, in newtons?
  26. 26.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
  27. 27.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ Pushing a crate 5 m took 2100 J of work. What force was used, in newtons?
  29. 29.🏋️ A 13 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A force of 20 N pushes a cart 7 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 420 N did 2100 J of work. How many metres did the object move?
  32. 32.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ Pushing a crate 5 m took 1700 J of work. What force was used, in newtons?
  34. 34.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 170 N did 1700 J of work. How many metres did the object move?

Answer key

  1. 7
  2. 2
  3. joule (J)
  4. 200
  5. through a distance
  6. 290
  7. 4
  8. 2300
  9. 850
  10. no, work stays the same
  11. 2
  12. 6
  13. 370
  14. 1610
  15. less effort
  16. 5
  17. 1320
  18. 6
  19. 2000
  20. 850
  21. 5
  22. 3
  23. 2
  24. 40
  25. 480
  26. load ÷ effort
  27. 3
  28. 420
  29. 520
  30. 140
  31. 5
  32. 6
  33. 340
  34. 5
  35. 4
  36. 300
  37. 300
  38. 3
  39. 300
  40. 10

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