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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 369 · 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.

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  1. 1.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  2. 2.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  3. 3.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  4. 4.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
  5. 5.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A 9 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A force of 10 N pushes a cart 3 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Pushing a crate 3 m took 420 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 40 N did 40 J of work. How many metres did the object move?
  11. 11.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  12. 12.🏋️ Pushing a crate 1 m took 80 J of work. What force was used, in newtons?
  13. 13.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A force of 400 N pushes a cart 3 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A force of 110 N did 1100 J of work. How many metres did the object move?
  16. 16.🏋️ Pushing a crate 5 m took 1500 J of work. What force was used, in newtons?
  17. 17.🏋️ A force of 300 N pushes a cart 2 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A 19 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A force of 450 N pushes a cart 3 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 340 N did 680 J of work. How many metres did the object move?
  21. 21.🏋️ A force of 370 N did 370 J of work. How many metres did the object move?
  22. 22.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ An 11 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 240 N pushes a cart 8 m along the floor. How much work is done, in joules?
  27. 27.🏋️ Pushing a crate 4 m took 1080 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 420 N pushes a cart 10 m along the floor. How much work is done, in joules?
  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 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ Pushing a crate 2 m took 540 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 400 N did 1600 J of work. How many metres did the object move?
  34. 34.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 260 N did 1560 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 490 N did 1470 J of work. How many metres did the object move?
  37. 37.🏋️ Pushing a crate 8 m took 1040 J of work. What force was used, in newtons?
  38. 38.🏋️ 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?
  39. 39.🏋️ A force of 100 N did 600 J of work. How many metres did the object move?
  40. 40.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?

Answer key

  1. through a distance
  2. less effort
  3. no, work stays the same
  4. load ÷ effort
  5. 3
  6. 450
  7. 30
  8. 5
  9. 140
  10. 1
  11. joule (J)
  12. 80
  13. 240
  14. 1200
  15. 10
  16. 300
  17. 600
  18. 950
  19. 1350
  20. 2
  21. 1
  22. 5
  23. 3
  24. 500
  25. 110
  26. 1920
  27. 270
  28. 4200
  29. 10
  30. 600
  31. 50
  32. 270
  33. 4
  34. 2
  35. 6
  36. 3
  37. 130
  38. 180
  39. 6
  40. 4

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