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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 370 · 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.🏋️ A force of 450 N pushes a cart 3 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
  3. 3.🏋️ A force of 450 N did 900 J of work. How many metres did the object move?
  4. 4.🏋️ A 1 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.🏋️ A machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A force of 210 N did 1890 J of work. How many metres did the object move?
  8. 8.🏋️ 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
  9. 9.🏋️ Pushing a crate 4 m took 960 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 130 N did 130 J of work. How many metres did the object move?
  11. 11.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Pushing a crate 9 m took 1530 J of work. What force was used, in newtons?
  13. 13.🏋️ Pushing a crate 5 m took 1150 J of work. What force was used, in newtons?
  14. 14.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A force of 40 N did 120 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 200 N pushes a cart 1 m along the floor. How much work is done, in joules?
  17. 17.🏋️ 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?
  18. 18.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 460 N pushes a cart 10 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  24. 24.🏋️ Pushing a crate 7 m took 3360 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 490 N did 1960 J of work. How many metres did the object move?
  26. 26.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  27. 27.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A force of 350 N pushes a cart 2 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Pushing a crate 5 m took 200 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 6 m took 600 J of work. What force was used, in newtons?
  31. 31.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  32. 32.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A force of 170 N did 1530 J of work. How many metres did the object move?
  34. 34.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ An 11 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 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 230 N did 690 J of work. How many metres did the object move?

Answer key

  1. 1350
  2. load ÷ effort
  3. 2
  4. 40
  5. 4
  6. 20
  7. 9
  8. no, work stays the same
  9. 240
  10. 1
  11. 5
  12. 170
  13. 230
  14. 20
  15. 3
  16. 200
  17. 120
  18. 5
  19. 4600
  20. 3
  21. 700
  22. 750
  23. joule (J)
  24. 480
  25. 4
  26. through a distance
  27. 4
  28. 700
  29. 40
  30. 100
  31. less effort
  32. 140
  33. 9
  34. 100
  35. 1000
  36. 280
  37. 330
  38. 4
  39. 50
  40. 3

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