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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 502 · 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 longer ramp to the same height needs … (a) less effort (b) no effort (c) the same effort (d) more effort
  2. 2.🏋️ A force of 440 N pushes a cart 5 m along the floor. How much work is done, in joules?
  3. 3.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  4. 4.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
  5. 5.🏋️ Pushing a crate 6 m took 1440 J of work. What force was used, in newtons?
  6. 6.🏋️ A force of 430 N pushes a cart 6 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ Pushing a crate 8 m took 3120 J of work. What force was used, in newtons?
  10. 10.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  11. 11.🏋️ A force of 160 N did 1120 J of work. How many metres did the object move?
  12. 12.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A 17 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  16. 16.🏋️ A force of 50 N pushes a cart 5 m along the floor. How much work is done, in joules?
  17. 17.🏋️ Pushing a crate 7 m took 2310 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 80 N did 80 J of work. How many metres did the object move?
  19. 19.🏋️ Pushing a crate 10 m took 600 J of work. What force was used, in newtons?
  20. 20.🏋️ Pushing a crate 10 m took 2500 J of work. What force was used, in newtons?
  21. 21.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A force of 250 N did 500 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 1 m took 110 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 2 m took 40 J of work. What force was used, in newtons?
  26. 26.🏋️ 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)
  27. 27.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A force of 410 N did 410 J of work. How many metres did the object move?
  29. 29.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A 9 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A force of 420 N did 4200 J of work. How many metres did the object move?
  32. 32.🏋️ 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?
  33. 33.🏋️ A force of 90 N did 720 J of work. How many metres did the object move?
  34. 34.🏋️ Pushing a crate 5 m took 1000 J of work. What force was used, in newtons?
  35. 35.🏋️ 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?
  36. 36.🏋️ A force of 110 N did 330 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 300 N did 300 J of work. How many metres did the object move?
  38. 38.🏋️ 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?
  39. 39.🏋️ Pushing a crate 2 m took 1000 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 350 N pushes a cart 2 m along the floor. How much work is done, in joules?

Answer key

  1. less effort
  2. 2200
  3. load ÷ effort
  4. no, work stays the same
  5. 240
  6. 2580
  7. 3
  8. 500
  9. 390
  10. through a distance
  11. 7
  12. 50
  13. 680
  14. 600
  15. joule (J)
  16. 250
  17. 330
  18. 1
  19. 60
  20. 250
  21. 6
  22. 720
  23. 2
  24. 110
  25. 20
  26. 500
  27. 2
  28. 1
  29. 750
  30. 360
  31. 10
  32. 700
  33. 8
  34. 200
  35. 800
  36. 3
  37. 1
  38. 170
  39. 500
  40. 700

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