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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 446 · 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 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  3. 3.🏋️ Pushing a crate 10 m took 4000 J of work. What force was used, in newtons?
  4. 4.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  5. 5.🏋️ 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?
  6. 6.🏋️ A force of 390 N did 390 J of work. How many metres did the object move?
  7. 7.🏋️ 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?
  8. 8.🏋️ Pushing a crate 8 m took 1200 J of work. What force was used, in newtons?
  9. 9.🏋️ A 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A 14 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A force of 430 N did 2580 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 480 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Pushing a crate 5 m took 750 J of work. What force was used, in newtons?
  15. 15.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) joule (J) (d) newton (N)
  16. 16.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) without moving it (d) very slowly
  19. 19.🏋️ 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
  20. 20.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 470 N pushes a cart 2 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Pushing a crate 2 m took 180 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 100 N pushes a cart 2 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 470 N did 4700 J of work. How many metres did the object move?
  25. 25.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ Pushing a crate 9 m took 3060 J of work. What force was used, in newtons?
  28. 28.🏋️ Pushing a crate 2 m took 840 J of work. What force was used, in newtons?
  29. 29.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ Pushing a crate 10 m took 3700 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 380 N pushes a cart 2 m along the floor. How much work is done, in joules?
  32. 32.🏋️ 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)
  33. 33.🏋️ A force of 30 N did 30 J of work. How many metres did the object move?
  34. 34.🏋️ A force of 500 N pushes a cart 3 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 460 N pushes a cart 10 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 230 N pushes a cart 1 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 70 N pushes a cart 8 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?

Answer key

  1. 180
  2. load ÷ effort
  3. 400
  4. less effort
  5. 40
  6. 1
  7. 130
  8. 150
  9. 320
  10. 50
  11. 140
  12. 6
  13. 960
  14. 150
  15. joule (J)
  16. 50
  17. 300
  18. through a distance
  19. no, work stays the same
  20. 3
  21. 940
  22. 90
  23. 200
  24. 10
  25. 6
  26. 4
  27. 340
  28. 420
  29. 1000
  30. 370
  31. 760
  32. 150
  33. 1
  34. 1500
  35. 4600
  36. 230
  37. 150
  38. 3
  39. 560
  40. 2

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