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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 417 · 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 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)
  2. 2.🏋️ Pushing a crate 2 m took 960 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 20 N did 40 J of work. How many metres did the object move?
  4. 4.🏋️ A force of 210 N pushes a cart 2 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 140 N did 840 J of work. How many metres did the object move?
  6. 6.🏋️ 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?
  7. 7.🏋️ A force of 250 N pushes a cart 7 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Pushing a crate 7 m took 140 J of work. What force was used, in newtons?
  9. 9.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 500 N did 2000 J of work. How many metres did the object move?
  11. 11.🏋️ Pushing a crate 2 m took 920 J of work. What force was used, in newtons?
  12. 12.🏋️ Pushing a crate 1 m took 170 J of work. What force was used, in newtons?
  13. 13.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
  14. 14.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ 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?
  16. 16.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 470 N pushes a cart 10 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Pushing a crate 7 m took 1260 J of work. What force was used, in newtons?
  19. 19.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 180 N did 900 J of work. How many metres did the object move?
  21. 21.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) watt hour (d) newton (N)
  22. 22.🏋️ A 5 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ Pushing a crate 1 m took 360 J of work. What force was used, in newtons?
  24. 24.🏋️ Pushing a crate 9 m took 1710 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 5 m took 1350 J of work. What force was used, in newtons?
  26. 26.🏋️ A 9 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 220 N did 1100 J of work. How many metres did the object move?
  28. 28.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ 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?
  30. 30.🏋️ A force of 420 N pushes a cart 3 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 40 N did 80 J of work. How many metres did the object move?
  32. 32.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ Pushing a crate 4 m took 1440 J of work. What force was used, in newtons?
  36. 36.🏋️ Pushing a crate 3 m took 1260 J of work. What force was used, in newtons?
  37. 37.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  38. 38.🏋️ 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
  39. 39.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 420 N pushes a cart 4 m along the floor. How much work is done, in joules?

Answer key

  1. 150
  2. 480
  3. 2
  4. 420
  5. 6
  6. 60
  7. 1750
  8. 20
  9. 600
  10. 4
  11. 460
  12. 170
  13. less effort
  14. 550
  15. 240
  16. 3
  17. 4700
  18. 180
  19. 5
  20. 5
  21. joule (J)
  22. 200
  23. 360
  24. 190
  25. 270
  26. 360
  27. 5
  28. 600
  29. 130
  30. 1260
  31. 2
  32. 950
  33. 4
  34. 270
  35. 360
  36. 420
  37. load ÷ effort
  38. no, work stays the same
  39. 4
  40. 1680

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