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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 401 · 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 490 N pushes a cart 7 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ Pushing a crate 1 m took 30 J of work. What force was used, in newtons?
  4. 4.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) very slowly (d) only upwards
  5. 5.🏋️ Pushing a crate 5 m took 1650 J of work. What force was used, in newtons?
  6. 6.🏋️ A force of 50 N pushes a cart 10 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Pushing a crate 6 m took 2520 J of work. What force was used, in newtons?
  8. 8.🏋️ Pushing a crate 3 m took 330 J of work. What force was used, in newtons?
  9. 9.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  13. 13.🏋️ A force of 200 N did 1200 J of work. How many metres did the object move?
  14. 14.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, by half (d) yes, always
  15. 15.🏋️ Pushing a crate 2 m took 280 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 330 N did 330 J of work. How many metres did the object move?
  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 80 N did 720 J of work. How many metres did the object move?
  19. 19.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 350 N pushes a cart 10 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 400 N did 800 J of work. How many metres did the object move?
  25. 25.🏋️ Pushing a crate 5 m took 1900 J of work. What force was used, in newtons?
  26. 26.🏋️ Pushing a crate 6 m took 2160 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 20 N pushes a cart 4 m along the floor. How much work is done, in joules?
  28. 28.🏋️ 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?
  29. 29.🏋️ A force of 70 N pushes a cart 4 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 490 N did 1960 J of work. How many metres did the object move?
  34. 34.🏋️ Pushing a crate 3 m took 1500 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 60 N pushes a cart 9 m along the floor. How much work is done, in joules?
  36. 36.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  38. 38.🏋️ A force of 110 N pushes a cart 10 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 110 N did 220 J of work. How many metres did the object move?
  40. 40.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 3430
  2. 300
  3. 30
  4. through a distance
  5. 330
  6. 500
  7. 420
  8. 110
  9. 6
  10. 3
  11. 750
  12. load ÷ effort
  13. 6
  14. no, work stays the same
  15. 140
  16. 1
  17. less effort
  18. 9
  19. 130
  20. 1000
  21. 5
  22. 3
  23. 3500
  24. 2
  25. 380
  26. 360
  27. 80
  28. 240
  29. 280
  30. 750
  31. 2
  32. 3
  33. 4
  34. 500
  35. 540
  36. 400
  37. joule (J)
  38. 1100
  39. 2
  40. 100

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