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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 605 · 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.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  2. 2.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) no, work stays the same (d) yes, by half
  3. 3.🏋️ 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?
  4. 4.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ A force of 100 N did 600 J of work. How many metres did the object move?
  6. 6.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  7. 7.🏋️ A force of 140 N pushes a cart 2 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Pushing a crate 10 m took 1100 J of work. What force was used, in newtons?
  10. 10.🏋️ An 8 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ Pushing a crate 2 m took 360 J of work. What force was used, in newtons?
  12. 12.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A force of 150 N did 450 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 30 N pushes a cart 2 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  16. 16.🏋️ A force of 270 N pushes a cart 8 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A 20 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ Pushing a crate 1 m took 410 J of work. What force was used, in newtons?
  21. 21.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
  22. 22.🏋️ A force of 40 N did 240 J of work. How many metres did the object move?
  23. 23.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A 10 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 smooth ramp is 12 m long and rises 2 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ 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?
  27. 27.🏋️ A force of 40 N did 360 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 220 N did 440 J of work. How many metres did the object move?
  29. 29.🏋️ Pushing a crate 9 m took 2070 J of work. What force was used, in newtons?
  30. 30.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 200 N pushes a cart 2 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Pushing a crate 2 m took 280 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 460 N pushes a cart 6 m along the floor. How much work is done, in joules?
  35. 35.🏋️ Pushing a crate 8 m took 1920 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 380 N pushes a cart 5 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A 17 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.🏋️ Pushing a crate 3 m took 180 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 490 N pushes a cart 9 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?

Answer key

  1. through a distance
  2. no, work stays the same
  3. 510
  4. 50
  5. 6
  6. joule (J)
  7. 280
  8. 900
  9. 110
  10. 240
  11. 180
  12. 400
  13. 3
  14. 60
  15. less effort
  16. 2160
  17. 200
  18. 300
  19. 600
  20. 410
  21. load ÷ effort
  22. 6
  23. 6
  24. 200
  25. 950
  26. 80
  27. 9
  28. 2
  29. 230
  30. 100
  31. 4
  32. 400
  33. 140
  34. 2760
  35. 240
  36. 1900
  37. 680
  38. 60
  39. 4410
  40. 2

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