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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 780 · 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.🏋️ A force of 100 N did 900 J of work. How many metres did the object move?
  2. 2.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  4. 4.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  6. 6.🏋️ 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?
  7. 7.🏋️ Pushing a crate 3 m took 960 J of work. What force was used, in newtons?
  8. 8.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Pushing a crate 10 m took 3500 J of work. What force was used, in newtons?
  10. 10.🏋️ 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?
  11. 11.🏋️ A force of 160 N pushes a cart 9 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ Pushing a crate 3 m took 120 J of work. What force was used, in newtons?
  14. 14.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) only on Mondays (d) yes, always
  15. 15.🏋️ A force of 300 N did 2400 J of work. How many metres did the object move?
  16. 16.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  18. 18.🏋️ A force of 260 N did 2340 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 360 N pushes a cart 2 m along the floor. How much work is done, in joules?
  20. 20.🏋️ Pushing a crate 5 m took 1800 J of work. What force was used, in newtons?
  21. 21.🏋️ Pushing a crate 10 m took 3700 J of work. What force was used, in newtons?
  22. 22.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  23. 23.🏋️ A force of 420 N did 1680 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 7 m took 3220 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 160 N did 160 J of work. How many metres did the object move?
  26. 26.🏋️ A force of 480 N pushes a cart 10 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 470 N did 3760 J of work. How many metres did the object move?
  29. 29.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 480 N did 3840 J of work. How many metres did the object move?
  31. 31.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 410 N did 2460 J of work. How many metres did the object move?
  33. 33.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A 14 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A force of 160 N did 640 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 50 N did 500 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 10 m took 4700 J of work. What force was used, in newtons?
  39. 39.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 410 N pushes a cart 4 m along the floor. How much work is done, in joules?

Answer key

  1. 9
  2. 3
  3. through a distance
  4. 5
  5. load ÷ effort
  6. 300
  7. 320
  8. 800
  9. 350
  10. 20
  11. 1440
  12. 3
  13. 40
  14. no, work stays the same
  15. 8
  16. 4
  17. joule (J)
  18. 9
  19. 720
  20. 360
  21. 370
  22. less effort
  23. 4
  24. 460
  25. 1
  26. 4800
  27. 50
  28. 8
  29. 4
  30. 8
  31. 20
  32. 6
  33. 5
  34. 5
  35. 700
  36. 4
  37. 10
  38. 470
  39. 250
  40. 1640

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