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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 585 · 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 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ Pushing a crate 7 m took 1680 J of work. What force was used, in newtons?
  3. 3.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  8. 8.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ 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?
  10. 10.🏋️ Pushing a crate 2 m took 180 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 300 N did 2100 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 20 N pushes a cart 8 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, always (d) yes, by half
  15. 15.🏋️ A force of 400 N did 2800 J of work. How many metres did the object move?
  16. 16.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  17. 17.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A force of 490 N pushes a cart 10 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ 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?
  22. 22.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) watt hour (d) metre (m)
  23. 23.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 150 N did 1350 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 20 N did 20 J of work. How many metres did the object move?
  26. 26.🏋️ Pushing a crate 3 m took 30 J of work. What force was used, in newtons?
  27. 27.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A 5 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 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?
  30. 30.🏋️ 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?
  31. 31.🏋️ A force of 440 N did 3080 J of work. How many metres did the object move?
  32. 32.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  33. 33.🏋️ Pushing a crate 1 m took 470 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 250 N pushes a cart 2 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A force of 330 N did 660 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 130 N did 520 J of work. How many metres did the object move?
  38. 38.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A force of 310 N pushes a cart 1 m along the floor. How much work is done, in joules?
  40. 40.🏋️ 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)

Answer key

  1. 4
  2. 240
  3. 100
  4. 650
  5. 500
  6. 4
  7. load ÷ effort
  8. 700
  9. 760
  10. 90
  11. 7
  12. 160
  13. 80
  14. no, work stays the same
  15. 7
  16. through a distance
  17. 4
  18. 350
  19. 4900
  20. 4
  21. 280
  22. joule (J)
  23. 50
  24. 9
  25. 1
  26. 10
  27. 400
  28. 100
  29. 240
  30. 50
  31. 7
  32. less effort
  33. 470
  34. 500
  35. 130
  36. 2
  37. 4
  38. 40
  39. 310
  40. 1000

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