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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 968 · 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 200 N pushes a cart 1 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 410 N did 2870 J of work. How many metres did the object move?
  3. 3.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  4. 4.🏋️ A force of 140 N pushes a cart 2 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A force of 430 N pushes a cart 7 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) only on Mondays (d) yes, always
  11. 11.🏋️ Pushing a crate 10 m took 1300 J of work. What force was used, in newtons?
  12. 12.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  13. 13.🏋️ A force of 20 N pushes a cart 3 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  15. 15.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ Pushing a crate 8 m took 3200 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 100 N did 800 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 170 N pushes a cart 3 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 170 N did 1700 J of work. How many metres did the object move?
  21. 21.🏋️ A force of 170 N did 1020 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 330 N did 2970 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 350 N pushes a cart 3 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 420 N pushes a cart 7 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 230 N did 2300 J of work. How many metres did the object move?
  26. 26.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
  27. 27.🏋️ A force of 120 N did 1200 J of work. How many metres did the object move?
  28. 28.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A force of 10 N pushes a cart 4 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 6 m took 1920 J of work. What force was used, in newtons?
  31. 31.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ Pushing a crate 4 m took 240 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 30 N pushes a cart 6 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 4 m took 720 J of work. What force was used, in newtons?
  35. 35.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 500 N pushes a cart 10 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 300 N did 1200 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 440 N pushes a cart 10 m along the floor. How much work is done, in joules?
  39. 39.🏋️ 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?
  40. 40.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?

Answer key

  1. 200
  2. 7
  3. through a distance
  4. 280
  5. 3
  6. 3
  7. 240
  8. 550
  9. 3010
  10. no, work stays the same
  11. 130
  12. load ÷ effort
  13. 60
  14. less effort
  15. 320
  16. 850
  17. 400
  18. 8
  19. 510
  20. 10
  21. 6
  22. 9
  23. 1050
  24. 2940
  25. 10
  26. joule (J)
  27. 10
  28. 130
  29. 40
  30. 320
  31. 300
  32. 60
  33. 180
  34. 180
  35. 550
  36. 5000
  37. 4
  38. 4400
  39. 950
  40. 5

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