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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 886 · 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 430 N did 860 J of work. How many metres did the object move?
  2. 2.🏋️ A 19 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  4. 4.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ 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
  6. 6.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Pushing a crate 1 m took 310 J of work. What force was used, in newtons?
  8. 8.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
  10. 10.🏋️ A 14 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A force of 350 N pushes a cart 4 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 390 N did 2340 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 480 N did 1440 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 350 N did 1400 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 140 N did 420 J of work. How many metres did the object move?
  17. 17.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  19. 19.🏋️ A 12 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ 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)
  21. 21.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 480 N did 480 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 1 m took 230 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 10 m took 800 J of work. What force was used, in newtons?
  26. 26.🏋️ Pushing a crate 7 m took 3360 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 6 m took 2460 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 450 N did 900 J of work. How many metres did the object move?
  29. 29.🏋️ Pushing a crate 1 m took 440 J of work. What force was used, in newtons?
  30. 30.🏋️ A 9 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 50 N did 150 J of work. How many metres did the object move?
  33. 33.🏋️ 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?
  34. 34.🏋️ A force of 180 N pushes a cart 2 m along the floor. How much work is done, in joules?
  35. 35.🏋️ 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?
  36. 36.🏋️ A force of 470 N did 4700 J of work. How many metres did the object move?
  37. 37.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  38. 38.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ Pushing a crate 9 m took 630 J of work. What force was used, in newtons?
  40. 40.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?

Answer key

  1. 2
  2. 760
  3. load ÷ effort
  4. 2
  5. no, work stays the same
  6. 5
  7. 310
  8. 150
  9. joule (J)
  10. 420
  11. 1400
  12. 5
  13. 6
  14. 3
  15. 4
  16. 3
  17. 600
  18. through a distance
  19. 480
  20. 900
  21. 600
  22. 5
  23. 1
  24. 230
  25. 80
  26. 480
  27. 410
  28. 2
  29. 440
  30. 450
  31. 60
  32. 3
  33. 270
  34. 360
  35. 550
  36. 10
  37. less effort
  38. 100
  39. 70
  40. 6

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