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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 317 · 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.

NameDateTime takenScore ___ / 40
  1. 1.🏋️ Pushing a crate 1 m took 20 J of work. What force was used, in newtons?
  2. 2.🏋️ A force of 450 N did 1350 J of work. How many metres did the object move?
  3. 3.🏋️ Pushing a crate 1 m took 330 J of work. What force was used, in newtons?
  4. 4.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  6. 6.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ Pushing a crate 9 m took 4140 J of work. What force was used, in newtons?
  9. 9.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  10. 10.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  11. 11.🏋️ 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?
  12. 12.🏋️ Pushing a crate 4 m took 1400 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 170 N did 1530 J of work. How many metres did the object move?
  14. 14.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A 14 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A force of 30 N did 300 J of work. How many metres did the object move?
  20. 20.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) no, work stays the same (d) yes, by half
  21. 21.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 70 N did 630 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 180 N pushes a cart 4 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ Pushing a crate 8 m took 1680 J of work. What force was used, in newtons?
  26. 26.🏋️ Pushing a crate 6 m took 1020 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 90 N pushes a cart 9 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 270 N did 1890 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 300 N did 900 J of work. How many metres did the object move?
  30. 30.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ 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?
  32. 32.🏋️ A 17 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 250 N did 500 J of work. How many metres did the object move?
  35. 35.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A 16 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A force of 40 N did 280 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 10 N pushes a cart 7 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 20
  2. 3
  3. 330
  4. 5
  5. less effort
  6. 20
  7. 3
  8. 460
  9. joule (J)
  10. through a distance
  11. 200
  12. 350
  13. 9
  14. 850
  15. 200
  16. 140
  17. 750
  18. 160
  19. 10
  20. no, work stays the same
  21. 350
  22. 9
  23. 720
  24. 6
  25. 210
  26. 170
  27. 810
  28. 7
  29. 3
  30. 2
  31. 300
  32. 170
  33. 3
  34. 2
  35. 3
  36. 500
  37. 480
  38. 7
  39. 70
  40. 500

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