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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 2 · 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 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A 20 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A force of 200 N pushes a cart 4 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 240 N pushes a cart 3 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A force of 40 N pushes a cart 7 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 410 N did 3280 J of work. How many metres did the object move?
  8. 8.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A force of 20 N pushes a cart 4 m along the floor. How much work is done, in joules?
  10. 10.🏋️ 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)
  11. 11.🏋️ A force of 60 N pushes a cart 4 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  13. 13.🏋️ A force of 120 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 470 N pushes a cart 2 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Pushing a crate 7 m took 420 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 250 N did 1500 J of work. How many metres did the object move?
  17. 17.🏋️ Pushing a crate 2 m took 140 J of work. What force was used, in newtons?
  18. 18.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 270 N did 2700 J of work. How many metres did the object move?
  21. 21.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 340 N pushes a cart 9 m along the floor. How much work is done, in joules?
  23. 23.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
  24. 24.🏋️ A force of 80 N pushes a cart 10 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 60 N pushes a cart 8 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 180 N pushes a cart 5 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) only on Mondays (d) yes, by half
  31. 31.🏋️ A force of 330 N did 2970 J of work. How many metres did the object move?
  32. 32.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 260 N pushes a cart 1 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) the same effort (d) no effort
  35. 35.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ Pushing a crate 9 m took 3060 J of work. What force was used, in newtons?
  37. 37.🏋️ A 13 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
  39. 39.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 90
  2. 950
  3. 600
  4. 800
  5. 720
  6. 280
  7. 8
  8. 700
  9. 80
  10. 300
  11. 240
  12. through a distance
  13. 240
  14. 940
  15. 60
  16. 6
  17. 70
  18. 6
  19. 6
  20. 10
  21. 2
  22. 3060
  23. load ÷ effort
  24. 800
  25. 240
  26. 3
  27. 480
  28. 900
  29. 5
  30. no, work stays the same
  31. 9
  32. 5
  33. 260
  34. less effort
  35. 50
  36. 340
  37. 390
  38. joule (J)
  39. 1000
  40. 300

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