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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 636 · 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.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  2. 2.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ Pushing a crate 2 m took 40 J of work. What force was used, in newtons?
  5. 5.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ Pushing a crate 5 m took 600 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 10 N did 30 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 50 N did 500 J of work. How many metres did the object move?
  9. 9.🏋️ A force of 500 N did 1000 J of work. How many metres did the object move?
  10. 10.🏋️ Pushing a crate 6 m took 540 J of work. What force was used, in newtons?
  11. 11.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  12. 12.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 60 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 40 N did 360 J of work. How many metres did the object move?
  15. 15.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) effort ÷ load (d) load ÷ effort
  16. 16.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) very slowly (d) only upwards
  17. 17.🏋️ A 19 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 smooth ramp is 12 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A force of 320 N pushes a cart 10 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 330 N pushes a cart 3 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 450 N pushes a cart 7 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Pushing a crate 1 m took 300 J of work. What force was used, in newtons?
  23. 23.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ An 11 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A 12 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ An 11 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 470 N pushes a cart 9 m along the floor. How much work is done, in joules?
  31. 31.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, always (d) yes, by half
  32. 32.🏋️ A force of 50 N pushes a cart 6 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Pushing a crate 10 m took 200 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 450 N pushes a cart 8 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 250 N did 1000 J of work. How many metres did the object move?
  37. 37.🏋️ Pushing a crate 7 m took 980 J of work. What force was used, in newtons?
  38. 38.🏋️ Pushing a crate 4 m took 280 J of work. What force was used, in newtons?
  39. 39.🏋️ Pushing a crate 7 m took 2240 J of work. What force was used, in newtons?
  40. 40.🏋️ Pushing a crate 4 m took 40 J of work. What force was used, in newtons?

Answer key

  1. joule (J)
  2. 350
  3. 600
  4. 20
  5. 400
  6. 120
  7. 3
  8. 10
  9. 2
  10. 90
  11. less effort
  12. 3
  13. 120
  14. 9
  15. load ÷ effort
  16. through a distance
  17. 190
  18. 200
  19. 3200
  20. 990
  21. 3150
  22. 300
  23. 3
  24. 6
  25. 440
  26. 360
  27. 4
  28. 220
  29. 300
  30. 4230
  31. no, work stays the same
  32. 300
  33. 20
  34. 3600
  35. 450
  36. 4
  37. 140
  38. 70
  39. 320
  40. 10

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