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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 910 · 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 force of 100 N did 900 J of work. How many metres did the object move?
  2. 2.🏋️ A 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ A force of 180 N pushes a cart 6 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A force of 450 N did 1800 J of work. How many metres did the object move?
  6. 6.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A force of 300 N did 3000 J of work. How many metres did the object move?
  8. 8.🏋️ Pushing a crate 5 m took 2350 J of work. What force was used, in newtons?
  9. 9.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
  10. 10.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
  12. 12.🏋️ Pushing a crate 3 m took 840 J of work. What force was used, in newtons?
  13. 13.🏋️ Pushing a crate 10 m took 4300 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 50 N did 200 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 460 N pushes a cart 5 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 350 N pushes a cart 2 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 500 N pushes a cart 4 m along the floor. How much work is done, in joules?
  18. 18.🏋️ An 8 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  21. 21.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  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 force of 160 N pushes a cart 6 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A 17 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ Pushing a crate 5 m took 1350 J of work. What force was used, in newtons?
  26. 26.🏋️ A 15 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 machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ 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
  30. 30.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 40 N pushes a cart 4 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ Pushing a crate 4 m took 280 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 3 m took 900 J of work. What force was used, in newtons?
  36. 36.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ Pushing a crate 5 m took 150 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 170 N pushes a cart 7 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A 3 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A force of 20 N did 40 J of work. How many metres did the object move?

Answer key

  1. 9
  2. 160
  3. 1080
  4. 850
  5. 4
  6. 600
  7. 10
  8. 470
  9. load ÷ effort
  10. 3
  11. less effort
  12. 280
  13. 430
  14. 4
  15. 2300
  16. 700
  17. 2000
  18. 240
  19. 800
  20. through a distance
  21. joule (J)
  22. 300
  23. 960
  24. 170
  25. 270
  26. 450
  27. 5
  28. 150
  29. no, work stays the same
  30. 50
  31. 160
  32. 4
  33. 4
  34. 70
  35. 300
  36. 400
  37. 30
  38. 1190
  39. 60
  40. 2

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