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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 196 · 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.

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  1. 1.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 390 N pushes a cart 10 m along the floor. 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 longer ramp to the same height needs … (a) more effort (b) less effort (c) the same effort (d) no effort
  5. 5.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) newton (N) (d) metre (m)
  6. 6.🏋️ A force of 320 N pushes a cart 8 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Pushing a crate 2 m took 900 J of work. What force was used, in newtons?
  8. 8.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ 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?
  11. 11.🏋️ A force of 230 N did 460 J of work. How many metres did the object move?
  12. 12.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  13. 13.🏋️ A force of 240 N did 1200 J of work. How many metres did the object move?
  14. 14.🏋️ A 14 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A 5 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ Pushing a crate 1 m took 390 J of work. What force was used, in newtons?
  17. 17.🏋️ Pushing a crate 8 m took 400 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 420 N did 2940 J of work. How many metres did the object move?
  19. 19.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) yes, always (d) only on Mondays
  21. 21.🏋️ A force of 140 N pushes a cart 2 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 350 N pushes a cart 5 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 220 N pushes a cart 2 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 9 m took 630 J of work. What force was used, in newtons?
  25. 25.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 280 N did 1120 J of work. How many metres did the object move?
  28. 28.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A force of 10 N pushes a cart 3 m along the floor. How much work is done, in joules?
  30. 30.🏋️ 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?
  31. 31.🏋️ Pushing a crate 1 m took 500 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 360 N pushes a cart 2 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Pushing a crate 10 m took 2000 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 70 N did 70 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 160 N did 800 J of work. How many metres did the object move?
  36. 36.🏋️ 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?
  37. 37.🏋️ A force of 220 N pushes a cart 4 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A force of 380 N did 2660 J of work. How many metres did the object move?
  40. 40.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 4
  2. 3900
  3. load ÷ effort
  4. less effort
  5. joule (J)
  6. 2560
  7. 450
  8. 5
  9. 190
  10. 50
  11. 2
  12. through a distance
  13. 5
  14. 560
  15. 200
  16. 390
  17. 50
  18. 7
  19. 6
  20. no, work stays the same
  21. 280
  22. 1750
  23. 440
  24. 70
  25. 550
  26. 320
  27. 4
  28. 140
  29. 30
  30. 750
  31. 500
  32. 720
  33. 200
  34. 1
  35. 5
  36. 60
  37. 880
  38. 40
  39. 7
  40. 450

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