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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 275 · 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.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
  2. 2.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
  3. 3.🏋️ Pushing a crate 6 m took 3000 J of work. What force was used, in newtons?
  4. 4.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
  6. 6.🏋️ A force of 420 N pushes a cart 2 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 350 N did 700 J of work. How many metres did the object move?
  8. 8.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 500 N did 3000 J of work. How many metres did the object move?
  10. 10.🏋️ A force of 250 N did 1250 J of work. How many metres did the object move?
  11. 11.🏋️ Pushing a crate 8 m took 2640 J of work. What force was used, in newtons?
  12. 12.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  13. 13.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 370 N did 3700 J of work. How many metres did the object move?
  18. 18.🏋️ Pushing a crate 1 m took 110 J of work. What force was used, in newtons?
  19. 19.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
  20. 20.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A 15 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ 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?
  24. 24.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ Pushing a crate 2 m took 200 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 110 N did 1100 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 370 N pushes a cart 6 m along the floor. How much work is done, in joules?
  28. 28.🏋️ 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?
  29. 29.🏋️ 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)
  30. 30.🏋️ Pushing a crate 2 m took 580 J of work. What force was used, in newtons?
  31. 31.🏋️ Pushing a crate 10 m took 4100 J of work. What force was used, in newtons?
  32. 32.🏋️ 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?
  33. 33.🏋️ A force of 40 N did 400 J of work. How many metres did the object move?
  34. 34.🏋️ Pushing a crate 9 m took 2610 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 500 N did 5000 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 60 N did 60 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 470 N did 4700 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 270 N did 2430 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 350 N did 3500 J of work. How many metres did the object move?
  40. 40.🏋️ 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?

Answer key

  1. load ÷ effort
  2. no, work stays the same
  3. 500
  4. 4
  5. joule (J)
  6. 840
  7. 2
  8. 3
  9. 6
  10. 5
  11. 330
  12. less effort
  13. 3
  14. 3
  15. 600
  16. 250
  17. 10
  18. 110
  19. through a distance
  20. 80
  21. 300
  22. 5
  23. 300
  24. 350
  25. 100
  26. 10
  27. 2220
  28. 240
  29. 50
  30. 290
  31. 410
  32. 320
  33. 10
  34. 290
  35. 10
  36. 1
  37. 10
  38. 9
  39. 10
  40. 450

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