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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 38 · 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) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
  2. 2.🏋️ Pushing a crate 2 m took 480 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 200 N did 600 J of work. How many metres did the object move?
  4. 4.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ A force of 490 N pushes a cart 7 m along the floor. How much work is done, in joules?
  6. 6.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  8. 8.🏋️ A force of 470 N pushes a cart 2 m along the floor. How much work is done, in joules?
  9. 9.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A force of 200 N pushes a cart 8 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Pushing a crate 3 m took 780 J of work. What force was used, in newtons?
  13. 13.🏋️ Pushing a crate 6 m took 780 J of work. What force was used, in newtons?
  14. 14.🏋️ Pushing a crate 10 m took 3400 J of work. What force was used, in newtons?
  15. 15.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) the same effort (d) more effort
  16. 16.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  18. 18.🏋️ Pushing a crate 6 m took 1500 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 20 N pushes a cart 1 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 320 N did 1920 J of work. How many metres did the object move?
  21. 21.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ Pushing a crate 2 m took 140 J of work. What force was used, in newtons?
  24. 24.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ An 8 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A force of 330 N pushes a cart 4 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Pushing a crate 6 m took 1920 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 1 m took 440 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 330 N did 1320 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 460 N pushes a cart 9 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 240 N pushes a cart 9 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 220 N pushes a cart 2 m along the floor. How much work is done, in joules?
  37. 37.🏋️ 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?
  38. 38.🏋️ Pushing a crate 3 m took 60 J of work. What force was used, in newtons?
  39. 39.🏋️ A 16 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 5 m took 300 J of work. What force was used, in newtons?

Answer key

  1. no, work stays the same
  2. 240
  3. 3
  4. 180
  5. 3430
  6. 720
  7. load ÷ effort
  8. 940
  9. 320
  10. 1600
  11. 4
  12. 260
  13. 130
  14. 340
  15. less effort
  16. 3
  17. joule (J)
  18. 250
  19. 20
  20. 6
  21. 120
  22. 2
  23. 70
  24. 800
  25. 80
  26. 1320
  27. 450
  28. 320
  29. 440
  30. 4
  31. 4140
  32. 2160
  33. 3
  34. 3
  35. 500
  36. 440
  37. 540
  38. 20
  39. 480
  40. 60

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