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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 145 · 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 7 m took 420 J of work. What force was used, in newtons?
  2. 2.🏋️ A force of 350 N pushes a cart 1 m along the floor. How much work is done, in joules?
  3. 3.🏋️ Pushing a crate 6 m took 240 J of work. What force was used, in newtons?
  4. 4.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  5. 5.🏋️ A force of 300 N pushes a cart 8 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A force of 300 N pushes a cart 4 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  8. 8.🏋️ A force of 20 N pushes a cart 3 m along the floor. How much work is done, in joules?
  9. 9.🏋️ 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?
  10. 10.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 490 N did 3920 J of work. How many metres did the object move?
  12. 12.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  13. 13.🏋️ A force of 290 N pushes a cart 8 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Pushing a crate 9 m took 3510 J of work. What force was used, in newtons?
  15. 15.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 100 N did 500 J of work. How many metres did the object move?
  17. 17.🏋️ 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?
  18. 18.🏋️ An 11 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 7 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ Pushing a crate 6 m took 2160 J of work. What force was used, in newtons?
  24. 24.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) very slowly (d) only upwards
  25. 25.🏋️ Pushing a crate 6 m took 2340 J of work. What force was used, in newtons?
  26. 26.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ Pushing a crate 4 m took 320 J of work. What force was used, in newtons?
  29. 29.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 90 N pushes a cart 10 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Pushing a crate 9 m took 4410 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 110 N did 660 J of work. How many metres did the object move?
  34. 34.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A force of 340 N pushes a cart 9 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 170 N did 510 J of work. How many metres did the object move?
  37. 37.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  39. 39.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 450 N did 2250 J of work. How many metres did the object move?

Answer key

  1. 60
  2. 350
  3. 40
  4. joule (J)
  5. 2400
  6. 1200
  7. less effort
  8. 60
  9. 700
  10. 3
  11. 8
  12. load ÷ effort
  13. 2320
  14. 390
  15. 6
  16. 5
  17. 420
  18. 110
  19. 210
  20. 800
  21. 4
  22. 5
  23. 360
  24. through a distance
  25. 390
  26. 700
  27. 3
  28. 80
  29. 600
  30. 300
  31. 900
  32. 490
  33. 6
  34. 200
  35. 3060
  36. 3
  37. 400
  38. no, work stays the same
  39. 550
  40. 5

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