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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 486 · 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 120 N pushes a cart 4 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A force of 300 N did 900 J of work. How many metres did the object move?
  4. 4.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ Pushing a crate 8 m took 2640 J of work. What force was used, in newtons?
  6. 6.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A force of 330 N did 3300 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 420 N did 3780 J of work. How many metres did the object move?
  9. 9.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  10. 10.🏋️ A force of 150 N pushes a cart 8 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 370 N did 1110 J of work. How many metres did the object move?
  12. 12.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A force of 70 N did 140 J of work. How many metres did the object move?
  15. 15.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  17. 17.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
  18. 18.🏋️ A force of 420 N pushes a cart 3 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 450 N pushes a cart 1 m along the floor. How much work is done, in joules?
  20. 20.🏋️ Pushing a crate 3 m took 1320 J of work. What force was used, in newtons?
  21. 21.🏋️ Pushing a crate 9 m took 2610 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 500 N did 5000 J of work. How many metres did the object move?
  23. 23.🏋️ Pushing a crate 8 m took 2240 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 140 N pushes a cart 7 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Pushing a crate 2 m took 820 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 140 N pushes a cart 8 m along the floor. How much work is done, in joules?
  27. 27.🏋️ Pushing a crate 7 m took 2520 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 120 N pushes a cart 2 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
  30. 30.🏋️ Pushing a crate 9 m took 990 J of work. What force was used, in newtons?
  31. 31.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A force of 190 N pushes a cart 7 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 200 N did 400 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 70 N pushes a cart 9 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 80 N did 720 J of work. How many metres did the object move?
  37. 37.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 50 N pushes a cart 2 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?

Answer key

  1. 480
  2. 6
  3. 3
  4. 450
  5. 330
  6. 900
  7. 10
  8. 9
  9. through a distance
  10. 1200
  11. 3
  12. 200
  13. 900
  14. 2
  15. 6
  16. joule (J)
  17. less effort
  18. 1260
  19. 450
  20. 440
  21. 290
  22. 10
  23. 280
  24. 980
  25. 410
  26. 1120
  27. 360
  28. 240
  29. load ÷ effort
  30. 110
  31. 700
  32. 550
  33. 1330
  34. 2
  35. 630
  36. 9
  37. 600
  38. 5
  39. 100
  40. 5

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