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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 187 · 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.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
  2. 2.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 480 N pushes a cart 2 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ Pushing a crate 5 m took 100 J of work. What force was used, in newtons?
  7. 7.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ Pushing a crate 6 m took 420 J of work. What force was used, in newtons?
  9. 9.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Pushing a crate 10 m took 2500 J of work. What force was used, in newtons?
  11. 11.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  13. 13.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A 16 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.🏋️ A force of 110 N pushes a cart 2 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ Pushing a crate 5 m took 1200 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 240 N did 720 J of work. How many metres did the object move?
  19. 19.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  20. 20.🏋️ A force of 300 N did 2400 J of work. How many metres did the object move?
  21. 21.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 270 N did 2430 J of work. How many metres did the object move?
  23. 23.🏋️ Pushing a crate 3 m took 1260 J of work. What force was used, in newtons?
  24. 24.🏋️ Pushing a crate 4 m took 1320 J of work. What force was used, in newtons?
  25. 25.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A force of 230 N did 2070 J of work. How many metres did the object move?
  27. 27.🏋️ Pushing a crate 9 m took 2160 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 60 N pushes a cart 1 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 20 N did 180 J of work. How many metres did the object move?
  30. 30.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ Pushing a crate 10 m took 3800 J of work. What force was used, in newtons?
  32. 32.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) watt hour (d) newton (N)
  33. 33.🏋️ Pushing a crate 3 m took 360 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 1 m took 290 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 6 m took 720 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 400 N did 1600 J of work. How many metres did the object move?
  37. 37.🏋️ Pushing a crate 10 m took 4000 J of work. What force was used, in newtons?
  38. 38.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ Pushing a crate 8 m took 400 J of work. What force was used, in newtons?
  40. 40.🏋️ 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)

Answer key

  1. less effort
  2. 3
  3. 2
  4. 960
  5. 100
  6. 20
  7. 50
  8. 70
  9. 6
  10. 250
  11. 3
  12. through a distance
  13. 6
  14. 320
  15. 220
  16. 2
  17. 240
  18. 3
  19. no, work stays the same
  20. 8
  21. 6
  22. 9
  23. 420
  24. 330
  25. 6
  26. 9
  27. 240
  28. 60
  29. 9
  30. 2
  31. 380
  32. joule (J)
  33. 120
  34. 290
  35. 120
  36. 4
  37. 400
  38. 4
  39. 50
  40. 500

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