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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 139 · 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 6 m took 1800 J of work. What force was used, in newtons?
  2. 2.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) load × effort (d) effort ÷ load
  3. 3.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A force of 60 N did 420 J of work. How many metres did the object move?
  5. 5.🏋️ Pushing a crate 7 m took 560 J of work. What force was used, in newtons?
  6. 6.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
  9. 9.🏋️ A 1 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A force of 180 N did 540 J of work. How many metres did the object move?
  12. 12.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 430 N pushes a cart 3 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A force of 310 N pushes a cart 3 m along the floor. How much work is done, in joules?
  21. 21.🏋️ 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
  22. 22.🏋️ A 9 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.🏋️ Pushing a crate 4 m took 2000 J of work. What force was used, in newtons?
  24. 24.🏋️ Pushing a crate 2 m took 540 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 1 m took 420 J of work. What force was used, in newtons?
  26. 26.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  27. 27.🏋️ A force of 110 N did 330 J of work. How many metres did the object move?
  28. 28.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  29. 29.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 220 N did 220 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 470 N pushes a cart 1 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 70 N pushes a cart 5 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 90 N pushes a cart 3 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 1 m took 40 J of work. What force was used, in newtons?
  35. 35.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 6 m took 660 J of work. What force was used, in newtons?
  37. 37.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 280 N pushes a cart 10 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?

Answer key

  1. 300
  2. load ÷ effort
  3. 150
  4. 7
  5. 80
  6. 4
  7. 200
  8. through a distance
  9. 30
  10. 640
  11. 3
  12. 3
  13. 1290
  14. 300
  15. 5
  16. 950
  17. 4
  18. 140
  19. 600
  20. 930
  21. no, work stays the same
  22. 90
  23. 500
  24. 270
  25. 420
  26. joule (J)
  27. 3
  28. less effort
  29. 450
  30. 1
  31. 470
  32. 350
  33. 270
  34. 40
  35. 6
  36. 110
  37. 550
  38. 700
  39. 2800
  40. 6

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