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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 364 · 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.🏋️ Pushing a crate 9 m took 180 J of work. What force was used, in newtons?
  2. 2.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
  5. 5.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) only on Mondays (d) yes, by half
  6. 6.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
  7. 7.🏋️ A force of 80 N did 320 J of work. How many metres did the object move?
  8. 8.🏋️ Pushing a crate 6 m took 1380 J of work. What force was used, in newtons?
  9. 9.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 130 N pushes a cart 4 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 130 N pushes a cart 1 m along the floor. How much work is done, in joules?
  12. 12.🏋️ 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?
  13. 13.🏋️ Pushing a crate 9 m took 2250 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 210 N pushes a cart 6 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A 17 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ 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?
  17. 17.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
  19. 19.🏋️ Pushing a crate 6 m took 720 J of work. What force was used, in newtons?
  20. 20.🏋️ Pushing a crate 6 m took 1680 J of work. What force was used, in newtons?
  21. 21.🏋️ Pushing a crate 3 m took 630 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 80 N pushes a cart 8 m along the floor. How much work is done, in joules?
  23. 23.🏋️ Pushing a crate 7 m took 3080 J of work. What force was used, in newtons?
  24. 24.🏋️ A 12 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.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
  26. 26.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 490 N pushes a cart 10 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Pushing a crate 3 m took 150 J of work. What force was used, in newtons?
  29. 29.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A 13 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 480 N pushes a cart 4 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Pushing a crate 3 m took 300 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 50 N pushes a cart 9 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 10 N pushes a cart 3 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ 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?
  38. 38.🏋️ Pushing a crate 1 m took 320 J of work. What force was used, in newtons?
  39. 39.🏋️ Pushing a crate 3 m took 510 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 170 N pushes a cart 9 m along the floor. How much work is done, in joules?

Answer key

  1. 20
  2. 3
  3. 4
  4. load ÷ effort
  5. no, work stays the same
  6. through a distance
  7. 4
  8. 230
  9. 650
  10. 520
  11. 130
  12. 300
  13. 250
  14. 1260
  15. 340
  16. 80
  17. 6
  18. less effort
  19. 120
  20. 280
  21. 210
  22. 640
  23. 440
  24. 120
  25. joule (J)
  26. 2
  27. 4900
  28. 50
  29. 10
  30. 260
  31. 3
  32. 1920
  33. 100
  34. 450
  35. 30
  36. 5
  37. 100
  38. 320
  39. 170
  40. 1530

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