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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 276 · 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 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  4. 4.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) yes, by half (d) only on Mondays
  5. 5.🏋️ A force of 20 N pushes a cart 10 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load + effort (d) load × effort
  8. 8.🏋️ 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?
  9. 9.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  12. 12.🏋️ A force of 80 N pushes a cart 7 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A force of 10 N did 20 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 120 N pushes a cart 9 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ Pushing a crate 7 m took 3010 J of work. What force was used, in newtons?
  20. 20.🏋️ Pushing a crate 4 m took 800 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 100 N did 500 J of work. How many metres did the object move?
  22. 22.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
  23. 23.🏋️ A 20 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 5 m long and rises 1 m. What effort pushes a 4750 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A force of 330 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ Pushing a crate 1 m took 200 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 410 N did 1230 J of work. How many metres did the object move?
  30. 30.🏋️ Pushing a crate 8 m took 160 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 160 N pushes a cart 9 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 140 N did 980 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 50 N pushes a cart 4 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 150 N did 450 J of work. How many metres did the object move?
  37. 37.🏋️ Pushing a crate 3 m took 690 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 20 N did 120 J of work. How many metres did the object move?
  39. 39.🏋️ Pushing a crate 1 m took 180 J of work. What force was used, in newtons?
  40. 40.🏋️ A 19 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 2
  2. 600
  3. less effort
  4. no, work stays the same
  5. 200
  6. 4
  7. load ÷ effort
  8. 150
  9. 110
  10. 150
  11. joule (J)
  12. 560
  13. 200
  14. 2
  15. 1080
  16. 4
  17. 5
  18. 3
  19. 430
  20. 200
  21. 5
  22. through a distance
  23. 600
  24. 950
  25. 660
  26. 4
  27. 510
  28. 200
  29. 3
  30. 20
  31. 1440
  32. 300
  33. 900
  34. 7
  35. 200
  36. 3
  37. 230
  38. 6
  39. 180
  40. 380

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