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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 130 · 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 2 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A force of 120 N pushes a cart 8 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ Pushing a crate 10 m took 1300 J of work. What force was used, in newtons?
  6. 6.🏋️ Pushing a crate 3 m took 720 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 90 N did 720 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 70 N pushes a cart 3 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ Pushing a crate 1 m took 110 J of work. What force was used, in newtons?
  11. 11.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ Pushing a crate 9 m took 2520 J of work. What force was used, in newtons?
  14. 14.🏋️ 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?
  15. 15.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  17. 17.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 60 N did 420 J of work. How many metres did the object move?
  19. 19.🏋️ Pushing a crate 2 m took 640 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 360 N pushes a cart 5 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 370 N did 370 J of work. How many metres did the object move?
  22. 22.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 200 N pushes a cart 3 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 7 m took 1960 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 330 N did 990 J of work. How many metres did the object move?
  26. 26.🏋️ A force of 40 N pushes a cart 1 m along the floor. How much work is done, in joules?
  27. 27.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) yes, by half (d) only on Mondays
  28. 28.🏋️ A force of 20 N pushes a cart 7 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A 3 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A force of 210 N did 1470 J of work. How many metres did the object move?
  31. 31.🏋️ Pushing a crate 4 m took 1200 J of work. What force was used, in newtons?
  32. 32.🏋️ 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?
  33. 33.🏋️ A force of 240 N pushes a cart 5 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ Pushing a crate 10 m took 4200 J of work. What force was used, in newtons?
  36. 36.🏋️ Pushing a crate 2 m took 300 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 2 m took 660 J of work. What force was used, in newtons?
  38. 38.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ Pushing a crate 5 m took 350 J of work. What force was used, in newtons?
  40. 40.🏋️ A 14 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 40
  2. 150
  3. 960
  4. 300
  5. 130
  6. 240
  7. 8
  8. 210
  9. 400
  10. 110
  11. 700
  12. 5
  13. 280
  14. 90
  15. 5
  16. through a distance
  17. 3
  18. 7
  19. 320
  20. 1800
  21. 1
  22. 500
  23. 600
  24. 280
  25. 3
  26. 40
  27. no, work stays the same
  28. 140
  29. 30
  30. 7
  31. 300
  32. 60
  33. 1200
  34. 400
  35. 420
  36. 150
  37. 330
  38. 4
  39. 70
  40. 700

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