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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 797 · 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 40 N pushes a cart 10 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
  3. 3.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
  4. 4.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
  5. 5.🏋️ Pushing a crate 8 m took 2560 J of work. What force was used, in newtons?
  6. 6.🏋️ Pushing a crate 1 m took 370 J of work. What force was used, in newtons?
  7. 7.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3900 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A force of 270 N did 1080 J of work. How many metres did the object move?
  9. 9.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 330 N pushes a cart 1 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Pushing a crate 6 m took 60 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 10 N pushes a cart 1 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A 2 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
  16. 16.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 460 N pushes a cart 2 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ Pushing a crate 8 m took 80 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 130 N did 130 J of work. How many metres did the object move?
  21. 21.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 250 N did 1500 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 260 N pushes a cart 2 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  25. 25.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ Pushing a crate 7 m took 280 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 7 m took 2870 J of work. What force was used, in newtons?
  28. 28.🏋️ Pushing a crate 8 m took 800 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 2 m took 120 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 10 N did 60 J of work. How many metres did the object move?
  31. 31.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 90 N pushes a cart 6 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Pushing a crate 5 m took 1650 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 2 m took 360 J of work. What force was used, in newtons?
  35. 35.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 60 N pushes a cart 3 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Pushing a crate 10 m took 1800 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 200 N did 1000 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 360 N pushes a cart 7 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 120 N pushes a cart 4 m along the floor. How much work is done, in joules?

Answer key

  1. 400
  2. through a distance
  3. less effort
  4. no, work stays the same
  5. 320
  6. 370
  7. 650
  8. 4
  9. 190
  10. 2
  11. 330
  12. 10
  13. 10
  14. 40
  15. joule (J)
  16. 3
  17. 920
  18. 550
  19. 10
  20. 1
  21. 3
  22. 6
  23. 520
  24. load ÷ effort
  25. 120
  26. 40
  27. 410
  28. 100
  29. 60
  30. 6
  31. 700
  32. 540
  33. 330
  34. 180
  35. 2
  36. 180
  37. 180
  38. 5
  39. 2520
  40. 480

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