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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 982 · 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) less effort (c) no effort (d) more effort
  2. 2.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 480 N pushes a cart 7 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 80 N did 720 J of work. How many metres did the object move?
  6. 6.🏋️ Pushing a crate 5 m took 950 J of work. What force was used, in newtons?
  7. 7.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  9. 9.🏋️ Pushing a crate 1 m took 10 J of work. What force was used, in newtons?
  10. 10.🏋️ Pushing a crate 4 m took 1960 J of work. What force was used, in newtons?
  11. 11.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
  12. 12.🏋️ A force of 140 N pushes a cart 8 m along the floor. How much work is done, in joules?
  13. 13.🏋️ Pushing a crate 10 m took 1900 J of work. What force was used, in newtons?
  14. 14.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ Pushing a crate 1 m took 390 J of work. What force was used, in newtons?
  16. 16.🏋️ 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?
  17. 17.🏋️ A force of 440 N pushes a cart 2 m along the floor. How much work is done, in joules?
  18. 18.🏋️ 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?
  19. 19.🏋️ A force of 180 N did 1620 J of work. How many metres did the object move?
  20. 20.🏋️ 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?
  21. 21.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
  22. 22.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  23. 23.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ An 18 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 machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ Pushing a crate 3 m took 690 J of work. What force was used, in newtons?
  27. 27.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 7 m took 2310 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 190 N did 380 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 310 N did 1550 J of work. How many metres did the object move?
  32. 32.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ Pushing a crate 10 m took 4700 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 3 m took 420 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 9 m took 2880 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 40 N pushes a cart 6 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ Pushing a crate 10 m took 3500 J of work. What force was used, in newtons?
  39. 39.🏋️ Pushing a crate 8 m took 3120 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 430 N pushes a cart 1 m along the floor. How much work is done, in joules?

Answer key

  1. less effort
  2. 100
  3. 4
  4. 3360
  5. 9
  6. 190
  7. 190
  8. load ÷ effort
  9. 10
  10. 490
  11. through a distance
  12. 1120
  13. 190
  14. 4
  15. 390
  16. 320
  17. 880
  18. 680
  19. 9
  20. 20
  21. no, work stays the same
  22. joule (J)
  23. 2
  24. 360
  25. 2
  26. 230
  27. 2
  28. 4
  29. 330
  30. 2
  31. 5
  32. 350
  33. 470
  34. 140
  35. 320
  36. 240
  37. 3
  38. 350
  39. 390
  40. 430

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