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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 753 · 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.🏋️ A force of 470 N did 1410 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 370 N pushes a cart 2 m along the floor. How much work is done, in joules?
  3. 3.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
  4. 4.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  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.🏋️ Pushing a crate 10 m took 1800 J of work. What force was used, in newtons?
  7. 7.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A force of 30 N pushes a cart 8 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A 5 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ 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?
  11. 11.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  14. 14.🏋️ A force of 340 N did 1700 J of work. How many metres did the object move?
  15. 15.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A force of 250 N pushes a cart 10 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  18. 18.🏋️ A force of 430 N pushes a cart 3 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 480 N did 2400 J of work. How many metres did the object move?
  20. 20.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ Pushing a crate 1 m took 470 J of work. What force was used, in newtons?
  23. 23.🏋️ 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?
  24. 24.🏋️ A force of 130 N did 1300 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 180 N did 900 J of work. How many metres did the object move?
  26. 26.🏋️ 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?
  27. 27.🏋️ Pushing a crate 2 m took 180 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 150 N did 300 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 130 N did 130 J of work. How many metres did the object move?
  30. 30.🏋️ A force of 380 N did 3420 J of work. How many metres did the object move?
  31. 31.🏋️ Pushing a crate 9 m took 2160 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 350 N pushes a cart 6 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 90 N pushes a cart 8 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 2 m took 1000 J of work. What force was used, in newtons?
  35. 35.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 10 m took 4000 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 120 N pushes a cart 1 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 250 N pushes a cart 2 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) load + effort (d) effort ÷ load
  40. 40.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 3
  2. 740
  3. through a distance
  4. 5
  5. no, work stays the same
  6. 180
  7. 550
  8. 240
  9. 150
  10. 950
  11. 3
  12. 150
  13. joule (J)
  14. 5
  15. 550
  16. 2500
  17. less effort
  18. 1290
  19. 5
  20. 200
  21. 1000
  22. 470
  23. 320
  24. 10
  25. 5
  26. 440
  27. 90
  28. 2
  29. 1
  30. 9
  31. 240
  32. 2100
  33. 720
  34. 500
  35. 4
  36. 400
  37. 120
  38. 500
  39. load ÷ effort
  40. 50

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