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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 332 · 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 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) yes, by half (d) only on Mondays
  4. 4.🏋️ A force of 180 N did 720 J of work. How many metres did the object move?
  5. 5.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A force of 120 N did 1200 J of work. How many metres did the object move?
  9. 9.🏋️ A force of 100 N did 600 J of work. How many metres did the object move?
  10. 10.🏋️ Pushing a crate 2 m took 760 J of work. What force was used, in newtons?
  11. 11.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
  12. 12.🏋️ Pushing a crate 2 m took 980 J of work. What force was used, in newtons?
  13. 13.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  15. 15.🏋️ A force of 430 N did 3010 J of work. How many metres did the object move?
  16. 16.🏋️ 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?
  17. 17.🏋️ Pushing a crate 3 m took 510 J of work. What force was used, in newtons?
  18. 18.🏋️ Pushing a crate 3 m took 900 J of work. What force was used, in newtons?
  19. 19.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) without moving it (d) very slowly
  20. 20.🏋️ A force of 410 N did 2460 J of work. How many metres did the object move?
  21. 21.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
  23. 23.🏋️ 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?
  24. 24.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 60 N did 540 J of work. How many metres did the object move?
  27. 27.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Pushing a crate 6 m took 1020 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 300 N pushes a cart 4 m along the floor. How much work is done, in joules?
  30. 30.🏋️ 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?
  31. 31.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 110 N did 770 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 500 N pushes a cart 7 m along the floor. How much work is done, in joules?
  36. 36.🏋️ Pushing a crate 2 m took 920 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 200 N did 200 J of work. How many metres did the object move?
  38. 38.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 40 N did 200 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 120 N pushes a cart 2 m along the floor. How much work is done, in joules?

Answer key

  1. 600
  2. 2
  3. no, work stays the same
  4. 4
  5. 4
  6. 240
  7. 280
  8. 10
  9. 6
  10. 380
  11. joule (J)
  12. 490
  13. 950
  14. load ÷ effort
  15. 7
  16. 700
  17. 170
  18. 300
  19. through a distance
  20. 6
  21. 700
  22. less effort
  23. 330
  24. 4
  25. 250
  26. 9
  27. 800
  28. 170
  29. 1200
  30. 20
  31. 250
  32. 850
  33. 850
  34. 7
  35. 3500
  36. 460
  37. 1
  38. 6
  39. 5
  40. 240

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