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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 818 · 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 5 m took 2300 J of work. What force was used, in newtons?
  2. 2.🏋️ Pushing a crate 5 m took 1650 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 60 N did 360 J of work. How many metres did the object move?
  4. 4.🏋️ Pushing a crate 3 m took 1230 J of work. What force was used, in newtons?
  5. 5.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) the same effort (d) no effort
  6. 6.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
  10. 10.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
  11. 11.🏋️ Pushing a crate 7 m took 560 J of work. What force was used, in newtons?
  12. 12.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A force of 440 N did 3080 J of work. How many metres did the object move?
  14. 14.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  16. 16.🏋️ Pushing a crate 9 m took 1530 J of work. What force was used, in newtons?
  17. 17.🏋️ A 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A force of 390 N did 3120 J of work. How many metres did the object move?
  19. 19.🏋️ Pushing a crate 5 m took 950 J of work. What force was used, in newtons?
  20. 20.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 360 N pushes a cart 9 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ Pushing a crate 7 m took 3010 J of work. What force was used, in newtons?
  25. 25.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ Pushing a crate 2 m took 380 J of work. What force was used, in newtons?
  27. 27.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) metre (m) (d) watt hour
  30. 30.🏋️ A force of 150 N pushes a cart 6 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1500 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 2250 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 280 N did 1960 J of work. How many metres did the object move?
  35. 35.🏋️ Pushing a crate 8 m took 3920 J of work. What force was used, in newtons?
  36. 36.🏋️ 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?
  37. 37.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 70 N pushes a cart 8 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Pushing a crate 1 m took 120 J of work. What force was used, in newtons?
  40. 40.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?

Answer key

  1. 460
  2. 330
  3. 6
  4. 410
  5. less effort
  6. 60
  7. 700
  8. 800
  9. no, work stays the same
  10. load ÷ effort
  11. 80
  12. 750
  13. 7
  14. 6
  15. through a distance
  16. 170
  17. 160
  18. 8
  19. 190
  20. 6
  21. 3240
  22. 20
  23. 300
  24. 430
  25. 5
  26. 190
  27. 20
  28. 2
  29. joule (J)
  30. 900
  31. 3
  32. 500
  33. 750
  34. 7
  35. 490
  36. 360
  37. 2
  38. 560
  39. 120
  40. 3

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