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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 922 · 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 machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
  4. 4.🏋️ Pushing a crate 9 m took 1350 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 360 N pushes a cart 2 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) no effort (d) the same effort
  7. 7.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
  9. 9.🏋️ Pushing a crate 5 m took 1000 J of work. What force was used, in newtons?
  10. 10.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  11. 11.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ Pushing a crate 7 m took 420 J of work. What force was used, in newtons?
  14. 14.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ Pushing a crate 8 m took 1920 J of work. What force was used, in newtons?
  16. 16.🏋️ Pushing a crate 10 m took 5000 J of work. What force was used, in newtons?
  17. 17.🏋️ A force of 230 N did 230 J of work. How many metres did the object move?
  18. 18.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A force of 470 N did 3290 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 390 N pushes a cart 7 m along the floor. How much work is done, in joules?
  23. 23.🏋️ Pushing a crate 6 m took 960 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 270 N pushes a cart 5 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 330 N pushes a cart 1 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ 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?
  30. 30.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ Pushing a crate 8 m took 2560 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 480 N pushes a cart 8 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ Pushing a crate 4 m took 120 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 90 N did 900 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 250 N did 750 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 280 N did 1960 J of work. How many metres did the object move?
  40. 40.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?

Answer key

  1. 5
  2. 800
  3. joule (J)
  4. 150
  5. 720
  6. less effort
  7. 5
  8. through a distance
  9. 200
  10. load ÷ effort
  11. 300
  12. 500
  13. 60
  14. 650
  15. 240
  16. 500
  17. 1
  18. 4
  19. 750
  20. 50
  21. 7
  22. 2730
  23. 160
  24. 1350
  25. 330
  26. 700
  27. 60
  28. 4
  29. 20
  30. 5
  31. 320
  32. 3840
  33. 3
  34. 2
  35. 800
  36. 30
  37. 10
  38. 3
  39. 7
  40. 6

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