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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 904 · 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.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) no, work stays the same (d) yes, by half
  2. 2.🏋️ A force of 40 N did 40 J of work. How many metres did the object move?
  3. 3.🏋️ A 3 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A 12 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ A force of 340 N pushes a cart 9 m along the floor. How much work is done, in joules?
  6. 6.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) newton (N) (d) watt hour
  7. 7.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A force of 90 N pushes a cart 1 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  10. 10.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  11. 11.🏋️ A force of 270 N did 1350 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 50 N did 50 J of work. How many metres did the object move?
  13. 13.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 450 N pushes a cart 5 m along the floor. How much work is done, in joules?
  16. 16.🏋️ Pushing a crate 4 m took 1120 J of work. What force was used, in newtons?
  17. 17.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A force of 10 N pushes a cart 7 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ Pushing a crate 5 m took 1150 J of work. What force was used, in newtons?
  23. 23.🏋️ 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)
  24. 24.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ Pushing a crate 1 m took 280 J of work. What force was used, in newtons?
  26. 26.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  27. 27.🏋️ A force of 310 N pushes a cart 4 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Pushing a crate 8 m took 720 J of work. What force was used, in newtons?
  29. 29.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A force of 350 N did 2450 J of work. How many metres did the object move?
  31. 31.🏋️ 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?
  32. 32.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ Pushing a crate 4 m took 440 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 190 N did 570 J of work. How many metres did the object move?
  35. 35.🏋️ Pushing a crate 4 m took 280 J of work. What force was used, in newtons?
  36. 36.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 110 N did 990 J of work. How many metres did the object move?
  40. 40.🏋️ 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)

Answer key

  1. no, work stays the same
  2. 1
  3. 30
  4. 360
  5. 3060
  6. joule (J)
  7. 4
  8. 90
  9. through a distance
  10. load ÷ effort
  11. 5
  12. 1
  13. 50
  14. 750
  15. 2250
  16. 280
  17. 3
  18. 4
  19. 700
  20. 70
  21. 250
  22. 230
  23. 400
  24. 6
  25. 280
  26. less effort
  27. 1240
  28. 90
  29. 500
  30. 7
  31. 90
  32. 5
  33. 110
  34. 3
  35. 70
  36. 6
  37. 950
  38. 6
  39. 9
  40. 700

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