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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 653 · 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) through a distance (b) very slowly (c) without moving it (d) only upwards
  2. 2.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
  3. 3.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A force of 210 N did 1260 J of work. How many metres did the object move?
  5. 5.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ 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
  7. 7.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A force of 290 N pushes a cart 7 m along the floor. How much work is done, in joules?
  10. 10.🏋️ An 11 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.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A force of 140 N did 1120 J of work. How many metres did the object move?
  13. 13.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A 20 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ Pushing a crate 2 m took 140 J of work. What force was used, in newtons?
  16. 16.🏋️ Pushing a crate 1 m took 390 J of work. What force was used, in newtons?
  17. 17.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
  18. 18.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) no effort (d) the same effort
  19. 19.🏋️ A force of 70 N pushes a cart 10 m along the floor. How much work is done, in joules?
  20. 20.🏋️ Pushing a crate 10 m took 1700 J of work. What force was used, in newtons?
  21. 21.🏋️ Pushing a crate 9 m took 3060 J of work. What force was used, in newtons?
  22. 22.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A force of 480 N pushes a cart 4 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A 12 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 350 N did 1750 J of work. How many metres did the object move?
  28. 28.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ Pushing a crate 7 m took 140 J of work. What force was used, in newtons?
  31. 31.🏋️ Pushing a crate 4 m took 960 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 130 N pushes a cart 1 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 430 N did 1290 J of work. How many metres did the object move?
  35. 35.🏋️ 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)
  36. 36.🏋️ Pushing a crate 10 m took 2300 J of work. What force was used, in newtons?
  37. 37.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 440 N pushes a cart 3 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A 17 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. through a distance
  2. joule (J)
  3. 50
  4. 6
  5. 650
  6. no, work stays the same
  7. 5
  8. 750
  9. 2030
  10. 330
  11. 3
  12. 8
  13. 6
  14. 400
  15. 70
  16. 390
  17. load ÷ effort
  18. less effort
  19. 700
  20. 170
  21. 340
  22. 300
  23. 5
  24. 200
  25. 1920
  26. 360
  27. 5
  28. 4
  29. 570
  30. 20
  31. 240
  32. 130
  33. 6
  34. 3
  35. 700
  36. 230
  37. 6
  38. 3
  39. 1320
  40. 340

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