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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 29 · 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.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) load × effort (d) effort ÷ load
  2. 2.🏋️ A force of 480 N pushes a cart 10 m along the floor. How much work is done, in joules?
  3. 3.🏋️ Pushing a crate 5 m took 1400 J of work. What force was used, in newtons?
  4. 4.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  5. 5.🏋️ A force of 180 N pushes a cart 10 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  8. 8.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A force of 60 N did 540 J of work. How many metres did the object move?
  10. 10.🏋️ 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
  11. 11.🏋️ Pushing a crate 4 m took 1320 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 230 N pushes a cart 5 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 230 N pushes a cart 8 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A force of 360 N pushes a cart 3 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 470 N did 2820 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 500 N pushes a cart 1 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A force of 120 N pushes a cart 8 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 500 N pushes a cart 9 m along the floor. How much work is done, in joules?
  22. 22.🏋️ 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?
  23. 23.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) the same effort (d) more effort
  24. 24.🏋️ Pushing a crate 2 m took 1000 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 350 N pushes a cart 3 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 490 N pushes a cart 9 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ Pushing a crate 5 m took 1300 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 130 N pushes a cart 9 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 10 N pushes a cart 6 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Pushing a crate 3 m took 720 J of work. What force was used, in newtons?
  33. 33.🏋️ Pushing a crate 10 m took 100 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 180 N did 540 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 270 N did 2430 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 210 N pushes a cart 5 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 160 N pushes a cart 9 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ Pushing a crate 4 m took 1080 J of work. What force was used, in newtons?
  40. 40.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?

Answer key

  1. load ÷ effort
  2. 4800
  3. 280
  4. through a distance
  5. 1800
  6. 6
  7. joule (J)
  8. 400
  9. 9
  10. no, work stays the same
  11. 330
  12. 1150
  13. 1840
  14. 5
  15. 1080
  16. 6
  17. 500
  18. 550
  19. 900
  20. 960
  21. 4500
  22. 320
  23. less effort
  24. 500
  25. 1050
  26. 4410
  27. 5
  28. 260
  29. 1170
  30. 450
  31. 60
  32. 240
  33. 10
  34. 3
  35. 9
  36. 1050
  37. 1440
  38. 5
  39. 270
  40. 3

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