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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 342 · 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 force of 180 N pushes a cart 1 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Pushing a crate 7 m took 1680 J of work. What force was used, in newtons?
  3. 3.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) yes, by half (d) only on Mondays
  4. 4.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) load × effort (d) effort ÷ load
  7. 7.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A force of 90 N pushes a cart 6 m along the floor. How much work is done, in joules?
  9. 9.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  10. 10.🏋️ A force of 380 N pushes a cart 5 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A 13 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.🏋️ An 8 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A force of 10 N pushes a cart 10 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A force of 190 N did 190 J of work. How many metres did the object move?
  16. 16.🏋️ Pushing a crate 9 m took 3780 J of work. What force was used, in newtons?
  17. 17.🏋️ Pushing a crate 5 m took 1350 J of work. What force was used, in newtons?
  18. 18.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ Pushing a crate 2 m took 700 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 480 N did 4800 J of work. How many metres did the object move?
  21. 21.🏋️ Pushing a crate 2 m took 980 J of work. What force was used, in newtons?
  22. 22.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  24. 24.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 30 N did 30 J of work. How many metres did the object move?
  26. 26.🏋️ Pushing a crate 5 m took 950 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 60 N did 240 J of work. How many metres did the object move?
  28. 28.🏋️ A 14 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.🏋️ A 10 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ 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)
  32. 32.🏋️ Pushing a crate 9 m took 1170 J of work. What force was used, in newtons?
  33. 33.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  35. 35.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 280 N pushes a cart 8 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Pushing a crate 3 m took 420 J of work. What force was used, in newtons?
  38. 38.🏋️ Pushing a crate 3 m took 780 J of work. What force was used, in newtons?
  39. 39.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ Pushing a crate 4 m took 160 J of work. What force was used, in newtons?

Answer key

  1. 180
  2. 240
  3. no, work stays the same
  4. 50
  5. 120
  6. load ÷ effort
  7. 900
  8. 540
  9. joule (J)
  10. 1900
  11. 390
  12. 80
  13. 100
  14. 510
  15. 1
  16. 420
  17. 270
  18. 2
  19. 350
  20. 10
  21. 490
  22. 6
  23. through a distance
  24. 3
  25. 1
  26. 190
  27. 4
  28. 560
  29. 400
  30. 130
  31. 250
  32. 130
  33. 4
  34. less effort
  35. 800
  36. 2240
  37. 140
  38. 260
  39. 6
  40. 40

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