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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 626 · 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.

NameDateTime takenScore ___ / 40
  1. 1.🏋️ Pushing a crate 7 m took 3430 J of work. What force was used, in newtons?
  2. 2.🏋️ Pushing a crate 8 m took 1440 J of work. What force was used, in newtons?
  3. 3.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A force of 80 N did 800 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 270 N did 1350 J of work. How many metres did the object move?
  6. 6.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
  7. 7.🏋️ A force of 90 N did 360 J of work. How many metres did the object move?
  8. 8.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 500 N pushes a cart 7 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Pushing a crate 10 m took 3700 J of work. What force was used, in newtons?
  11. 11.🏋️ Pushing a crate 8 m took 160 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 140 N pushes a cart 5 m along the floor. How much work is done, in joules?
  13. 13.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
  14. 14.🏋️ A force of 460 N did 1840 J of work. How many metres did the object move?
  15. 15.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  16. 16.🏋️ A force of 100 N pushes a cart 2 m along the floor. How much work is done, in joules?
  17. 17.🏋️ Pushing a crate 6 m took 2460 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 390 N did 1170 J of work. How many metres did the object move?
  19. 19.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 70 N pushes a cart 1 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) very slowly (d) only upwards
  22. 22.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  23. 23.🏋️ A force of 180 N did 720 J of work. How many metres did the object move?
  24. 24.🏋️ A 15 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A force of 60 N did 180 J of work. How many metres did the object move?
  26. 26.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 30 N did 210 J of work. How many metres did the object move?
  28. 28.🏋️ Pushing a crate 3 m took 1440 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 6 m took 2760 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 10 m took 800 J of work. What force was used, in newtons?
  31. 31.🏋️ Pushing a crate 8 m took 2640 J of work. What force was used, in newtons?
  32. 32.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A force of 80 N pushes a cart 5 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 330 N did 2970 J of work. How many metres did the object move?
  37. 37.🏋️ A 16 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 780 N when you push with 130 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 480 N pushes a cart 4 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 70 N pushes a cart 5 m along the floor. How much work is done, in joules?

Answer key

  1. 490
  2. 180
  3. 100
  4. 10
  5. 5
  6. no, work stays the same
  7. 4
  8. 2
  9. 3500
  10. 370
  11. 20
  12. 700
  13. load ÷ effort
  14. 4
  15. joule (J)
  16. 200
  17. 410
  18. 3
  19. 3
  20. 70
  21. through a distance
  22. less effort
  23. 4
  24. 300
  25. 3
  26. 2
  27. 7
  28. 480
  29. 460
  30. 80
  31. 330
  32. 500
  33. 150
  34. 60
  35. 400
  36. 9
  37. 640
  38. 6
  39. 1920
  40. 350

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