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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 774 · 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 machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) newton (N) (d) metre (m)
  3. 3.🏋️ Pushing a crate 10 m took 400 J of work. What force was used, in newtons?
  4. 4.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
  5. 5.🏋️ A force of 450 N did 2250 J of work. How many metres did the object move?
  6. 6.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 60 N pushes a cart 5 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Pushing a crate 3 m took 930 J of work. What force was used, in newtons?
  9. 9.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 380 N pushes a cart 10 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Pushing a crate 5 m took 650 J of work. What force was used, in newtons?
  15. 15.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
  16. 16.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ Pushing a crate 1 m took 30 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 60 N pushes a cart 9 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 400 N did 800 J of work. How many metres did the object move?
  20. 20.🏋️ A force of 20 N did 180 J of work. How many metres did the object move?
  21. 21.🏋️ Pushing a crate 5 m took 350 J of work. What force was used, in newtons?
  22. 22.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 310 N did 310 J of work. How many metres did the object move?
  24. 24.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ Pushing a crate 5 m took 2150 J of work. What force was used, in newtons?
  26. 26.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 90 N did 180 J of work. How many metres did the object move?
  29. 29.🏋️ Pushing a crate 7 m took 70 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 160 N pushes a cart 3 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ Pushing a crate 4 m took 480 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 330 N pushes a cart 8 m along the floor. How much work is done, in joules?
  34. 34.🏋️ 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?
  35. 35.🏋️ 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?
  36. 36.🏋️ Pushing a crate 2 m took 120 J of work. What force was used, in newtons?
  37. 37.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
  38. 38.🏋️ Pushing a crate 1 m took 120 J of work. What force was used, in newtons?
  39. 39.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) yes, by half (d) only on Mondays
  40. 40.🏋️ A force of 270 N did 2700 J of work. How many metres did the object move?

Answer key

  1. 4
  2. joule (J)
  3. 40
  4. load ÷ effort
  5. 5
  6. 2
  7. 300
  8. 310
  9. 2
  10. 6
  11. 6
  12. 2
  13. 3800
  14. 130
  15. less effort
  16. 100
  17. 30
  18. 540
  19. 2
  20. 9
  21. 70
  22. 50
  23. 1
  24. 3
  25. 430
  26. 2
  27. 40
  28. 2
  29. 10
  30. 480
  31. 850
  32. 120
  33. 2640
  34. 360
  35. 60
  36. 60
  37. through a distance
  38. 120
  39. no, work stays the same
  40. 10

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