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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 570 · 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 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?
  2. 2.🏋️ A force of 200 N pushes a cart 6 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 20 N pushes a cart 5 m along the floor. How much work is done, in joules?
  4. 4.🏋️ 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)
  5. 5.🏋️ Pushing a crate 10 m took 3000 J of work. What force was used, in newtons?
  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.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  8. 8.🏋️ A force of 460 N pushes a cart 2 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 110 N pushes a cart 4 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
  12. 12.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ Pushing a crate 3 m took 150 J of work. What force was used, in newtons?
  15. 15.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 220 N pushes a cart 1 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A force of 380 N did 1900 J of work. How many metres did the object move?
  19. 19.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  20. 20.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ Pushing a crate 10 m took 4000 J of work. What force was used, in newtons?
  22. 22.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 40 N did 160 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 300 N pushes a cart 5 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 60 N pushes a cart 5 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A 19 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 180 N did 360 J of work. How many metres did the object move?
  28. 28.🏋️ Pushing a crate 9 m took 1800 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 340 N pushes a cart 7 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 420 N did 840 J of work. How many metres did the object move?
  32. 32.🏋️ Pushing a crate 2 m took 1000 J of work. What force was used, in newtons?
  33. 33.🏋️ Pushing a crate 8 m took 1680 J of work. What force was used, in newtons?
  34. 34.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ Pushing a crate 1 m took 390 J of work. What force was used, in newtons?
  36. 36.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  37. 37.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 400 N did 1600 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 390 N did 1560 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 110 N pushes a cart 5 m along the floor. How much work is done, in joules?

Answer key

  1. 650
  2. 1200
  3. 100
  4. 150
  5. 300
  6. no, work stays the same
  7. joule (J)
  8. 920
  9. 440
  10. 5
  11. less effort
  12. 6
  13. 540
  14. 50
  15. 5
  16. 220
  17. 270
  18. 5
  19. through a distance
  20. 700
  21. 400
  22. 3
  23. 4
  24. 1500
  25. 300
  26. 950
  27. 2
  28. 200
  29. 2380
  30. 500
  31. 2
  32. 500
  33. 210
  34. 500
  35. 390
  36. load ÷ effort
  37. 150
  38. 4
  39. 4
  40. 550

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