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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 76 · 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.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  2. 2.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ 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?
  4. 4.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A force of 350 N pushes a cart 4 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Pushing a crate 6 m took 360 J of work. What force was used, in newtons?
  8. 8.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Pushing a crate 9 m took 3510 J of work. What force was used, in newtons?
  10. 10.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A force of 360 N pushes a cart 10 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 140 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 10 N pushes a cart 2 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
  17. 17.🏋️ A force of 310 N pushes a cart 2 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ 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)
  23. 23.🏋️ A 19 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) metre (m) (d) watt hour
  26. 26.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 380 N did 2660 J of work. How many metres did the object move?
  28. 28.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ Pushing a crate 7 m took 910 J of work. What force was used, in newtons?
  31. 31.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 40 N did 200 J of work. How many metres did the object move?
  33. 33.🏋️ Pushing a crate 2 m took 60 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 320 N pushes a cart 3 m along the floor. How much work is done, in joules?
  35. 35.🏋️ Pushing a crate 8 m took 1120 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 390 N did 1170 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 240 N did 480 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 500 N pushes a cart 10 m along the floor. How much work is done, in joules?
  39. 39.🏋️ 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?
  40. 40.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?

Answer key

  1. through a distance
  2. 550
  3. 200
  4. 300
  5. 1400
  6. 6
  7. 60
  8. 3
  9. 390
  10. 900
  11. 3600
  12. 4
  13. 280
  14. 20
  15. 2
  16. no, work stays the same
  17. 620
  18. 5
  19. 500
  20. 60
  21. 2
  22. 250
  23. 950
  24. 250
  25. joule (J)
  26. 2
  27. 7
  28. 190
  29. 330
  30. 130
  31. 90
  32. 5
  33. 30
  34. 960
  35. 140
  36. 3
  37. 2
  38. 5000
  39. 130
  40. 3

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