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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 732 · 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 210 N pushes a cart 8 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) load + effort (d) effort ÷ load
  3. 3.🏋️ An 8 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ Pushing a crate 10 m took 1500 J of work. What force was used, in newtons?
  5. 5.🏋️ Pushing a crate 7 m took 560 J of work. What force was used, in newtons?
  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.🏋️ Pushing a crate 4 m took 1840 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 70 N pushes a cart 6 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 30 N did 180 J of work. How many metres did the object move?
  10. 10.🏋️ A force of 180 N did 180 J of work. How many metres did the object move?
  11. 11.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) more effort (d) the same effort
  12. 12.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) watt hour (d) metre (m)
  13. 13.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ An 18 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 machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ Pushing a crate 4 m took 1160 J of work. What force was used, in newtons?
  17. 17.🏋️ Pushing a crate 7 m took 3290 J of work. What force was used, in newtons?
  18. 18.🏋️ 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?
  19. 19.🏋️ Pushing a crate 4 m took 80 J of work. What force was used, in newtons?
  20. 20.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ 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
  22. 22.🏋️ A force of 100 N did 200 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 230 N pushes a cart 2 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 30 N did 60 J of work. How many metres did the object move?
  25. 25.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A force of 460 N pushes a cart 3 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 200 N pushes a cart 7 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Pushing a crate 5 m took 2300 J of work. What force was used, in newtons?
  30. 30.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
  31. 31.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ Pushing a crate 1 m took 380 J of work. What force was used, in newtons?
  33. 33.🏋️ 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?
  34. 34.🏋️ A force of 300 N pushes a cart 1 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 50 N did 250 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 460 N did 1840 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 500 N pushes a cart 7 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ Pushing a crate 7 m took 350 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 360 N pushes a cart 9 m along the floor. How much work is done, in joules?

Answer key

  1. 1680
  2. load ÷ effort
  3. 240
  4. 150
  5. 80
  6. 20
  7. 460
  8. 420
  9. 6
  10. 1
  11. less effort
  12. joule (J)
  13. 900
  14. 180
  15. 5
  16. 290
  17. 470
  18. 80
  19. 20
  20. 200
  21. no, work stays the same
  22. 2
  23. 460
  24. 2
  25. 360
  26. 1380
  27. 320
  28. 1400
  29. 460
  30. through a distance
  31. 2
  32. 380
  33. 40
  34. 300
  35. 5
  36. 4
  37. 3500
  38. 4
  39. 50
  40. 3240

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