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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 127 · 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 70 N pushes a cart 6 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 80 N did 320 J of work. How many metres did the object move?
  3. 3.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ Pushing a crate 7 m took 1120 J of work. What force was used, in newtons?
  6. 6.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
  7. 7.🏋️ Pushing a crate 1 m took 130 J of work. What force was used, in newtons?
  8. 8.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ Pushing a crate 10 m took 2700 J of work. What force was used, in newtons?
  11. 11.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
  13. 13.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) metre (m) (d) watt hour
  14. 14.🏋️ A force of 160 N did 160 J of work. How many metres did the object move?
  15. 15.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A force of 360 N pushes a cart 10 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ Pushing a crate 3 m took 1230 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 40 N pushes a cart 4 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A 17 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A force of 270 N pushes a cart 2 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 250 N did 1500 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 160 N did 480 J of work. How many metres did the object move?
  25. 25.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A force of 100 N did 500 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 70 N pushes a cart 1 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ Pushing a crate 10 m took 1600 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 1 m took 180 J of work. What force was used, in newtons?
  31. 31.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 470 N pushes a cart 4 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ Pushing a crate 2 m took 640 J of work. What force was used, in newtons?
  35. 35.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) the same effort (d) no effort
  36. 36.🏋️ A force of 80 N pushes a cart 1 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 130 N did 910 J of work. How many metres did the object move?
  38. 38.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 380 N pushes a cart 2 m along the floor. How much work is done, in joules?

Answer key

  1. 420
  2. 4
  3. 450
  4. 1000
  5. 160
  6. through a distance
  7. 130
  8. 4
  9. 250
  10. 270
  11. 6
  12. load ÷ effort
  13. joule (J)
  14. 1
  15. 950
  16. 3600
  17. 600
  18. 410
  19. 160
  20. 5
  21. 170
  22. 540
  23. 6
  24. 3
  25. 300
  26. 5
  27. 70
  28. 40
  29. 160
  30. 180
  31. 5
  32. 1880
  33. 4
  34. 320
  35. less effort
  36. 80
  37. 7
  38. 160
  39. 200
  40. 760

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