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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 505 · 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.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) no, work stays the same (d) only on Mondays
  2. 2.🏋️ A force of 80 N pushes a cart 3 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  5. 5.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A force of 490 N did 2940 J of work. How many metres did the object move?
  7. 7.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ 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?
  9. 9.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
  11. 11.🏋️ A force of 180 N pushes a cart 6 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Pushing a crate 9 m took 3150 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 390 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 250 N did 1000 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 140 N pushes a cart 2 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
  18. 18.🏋️ A force of 200 N pushes a cart 9 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Pushing a crate 1 m took 40 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 310 N pushes a cart 2 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 190 N pushes a cart 5 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 300 N did 1200 J of work. How many metres did the object move?
  23. 23.🏋️ Pushing a crate 3 m took 840 J of work. What force was used, in newtons?
  24. 24.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ Pushing a crate 3 m took 1410 J of work. What force was used, in newtons?
  28. 28.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 6 m took 660 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 310 N did 620 J of work. How many metres did the object move?
  31. 31.🏋️ Pushing a crate 2 m took 340 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 70 N did 700 J of work. How many metres did the object move?
  33. 33.🏋️ Pushing a crate 3 m took 390 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 10 N pushes a cart 2 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 420 N pushes a cart 9 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A 13 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 machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 470 N did 470 J of work. How many metres did the object move?
  40. 40.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly

Answer key

  1. no, work stays the same
  2. 240
  3. 3
  4. load ÷ effort
  5. 150
  6. 6
  7. 3
  8. 60
  9. 750
  10. less effort
  11. 1080
  12. 350
  13. 780
  14. 4
  15. 280
  16. 5
  17. joule (J)
  18. 1800
  19. 40
  20. 620
  21. 950
  22. 4
  23. 280
  24. 750
  25. 270
  26. 800
  27. 470
  28. 3
  29. 110
  30. 2
  31. 170
  32. 10
  33. 130
  34. 20
  35. 3780
  36. 5
  37. 390
  38. 5
  39. 1
  40. through a distance

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