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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 496 · 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.

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  1. 1.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ Pushing a crate 6 m took 1020 J of work. What force was used, in newtons?
  3. 3.🏋️ 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)
  4. 4.🏋️ Pushing a crate 6 m took 120 J of work. What force was used, in newtons?
  5. 5.🏋️ Pushing a crate 6 m took 2220 J of work. What force was used, in newtons?
  6. 6.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  7. 7.🏋️ Pushing a crate 9 m took 900 J of work. What force was used, in newtons?
  8. 8.🏋️ Pushing a crate 1 m took 410 J of work. What force was used, in newtons?
  9. 9.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  10. 10.🏋️ Pushing a crate 9 m took 360 J of work. What force was used, in newtons?
  11. 11.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ Pushing a crate 3 m took 1260 J of work. What force was used, in newtons?
  14. 14.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
  16. 16.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ Pushing a crate 5 m took 1000 J of work. What force was used, in newtons?
  18. 18.🏋️ A 3 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 machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ Pushing a crate 5 m took 1700 J of work. What force was used, in newtons?
  21. 21.🏋️ A 9 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A force of 370 N pushes a cart 2 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A 5 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.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ Pushing a crate 3 m took 780 J of work. What force was used, in newtons?
  28. 28.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
  29. 29.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, always (d) yes, by half
  30. 30.🏋️ A force of 450 N pushes a cart 9 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 230 N pushes a cart 3 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ Pushing a crate 10 m took 3500 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 4 m took 960 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 350 N pushes a cart 2 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 420 N pushes a cart 10 m along the floor. How much work is done, in joules?

Answer key

  1. 5
  2. 170
  3. 50
  4. 20
  5. 370
  6. load ÷ effort
  7. 100
  8. 410
  9. through a distance
  10. 40
  11. 2
  12. 100
  13. 420
  14. 400
  15. less effort
  16. 5
  17. 200
  18. 90
  19. 5
  20. 340
  21. 450
  22. 740
  23. 280
  24. 50
  25. 80
  26. 250
  27. 260
  28. joule (J)
  29. no, work stays the same
  30. 4050
  31. 690
  32. 570
  33. 350
  34. 240
  35. 700
  36. 600
  37. 4
  38. 300
  39. 3
  40. 4200

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