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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 245 · 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 force of 130 N pushes a cart 5 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Pushing a crate 9 m took 1080 J of work. What force was used, in newtons?
  3. 3.🏋️ Pushing a crate 4 m took 1080 J of work. What force was used, in newtons?
  4. 4.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A force of 440 N pushes a cart 7 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  10. 10.🏋️ Pushing a crate 2 m took 180 J of work. What force was used, in newtons?
  11. 11.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Pushing a crate 2 m took 500 J of work. What force was used, in newtons?
  13. 13.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ Pushing a crate 2 m took 980 J of work. What force was used, in newtons?
  15. 15.🏋️ Pushing a crate 2 m took 900 J of work. What force was used, in newtons?
  16. 16.🏋️ Pushing a crate 4 m took 1200 J of work. What force was used, in newtons?
  17. 17.🏋️ Pushing a crate 3 m took 1170 J of work. What force was used, in newtons?
  18. 18.🏋️ Pushing a crate 1 m took 310 J of work. What force was used, in newtons?
  19. 19.🏋️ 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?
  20. 20.🏋️ Pushing a crate 6 m took 1260 J of work. What force was used, in newtons?
  21. 21.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  22. 22.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
  23. 23.🏋️ Pushing a crate 3 m took 1470 J of work. What force was used, in newtons?
  24. 24.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  25. 25.🏋️ 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)
  26. 26.🏋️ Pushing a crate 9 m took 2970 J of work. What force was used, in newtons?
  27. 27.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 160 N pushes a cart 5 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  30. 30.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A force of 270 N pushes a cart 1 m along the floor. How much work is done, in joules?
  32. 32.🏋️ 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)
  33. 33.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ Pushing a crate 2 m took 880 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 90 N pushes a cart 1 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 650
  2. 120
  3. 270
  4. 200
  5. 5
  6. 3080
  7. 1000
  8. 800
  9. load ÷ effort
  10. 90
  11. 6
  12. 250
  13. 4
  14. 490
  15. 450
  16. 300
  17. 390
  18. 310
  19. 80
  20. 210
  21. no, work stays the same
  22. less effort
  23. 490
  24. joule (J)
  25. 50
  26. 330
  27. 10
  28. 800
  29. through a distance
  30. 200
  31. 270
  32. 700
  33. 4
  34. 440
  35. 90
  36. 1000
  37. 6
  38. 150
  39. 1000
  40. 600

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