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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 604 · 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.🏋️ Pushing a crate 2 m took 280 J of work. What force was used, in newtons?
  2. 2.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ A force of 450 N did 1800 J of work. How many metres did the object move?
  4. 4.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A force of 330 N pushes a cart 2 m along the floor. How much work is done, in joules?
  6. 6.🏋️ Pushing a crate 4 m took 960 J of work. What force was used, in newtons?
  7. 7.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
  8. 8.🏋️ A force of 200 N did 1400 J of work. How many metres did the object move?
  9. 9.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 250 N pushes a cart 8 m along the floor. How much work is done, in joules?
  11. 11.🏋️ 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
  12. 12.🏋️ A force of 240 N did 2400 J of work. How many metres did the object move?
  13. 13.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A 14 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A force of 450 N pushes a cart 5 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 150 N did 150 J of work. How many metres did the object move?
  17. 17.🏋️ 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)
  18. 18.🏋️ A force of 500 N pushes a cart 1 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
  20. 20.🏋️ A force of 440 N did 440 J of work. How many metres did the object move?
  21. 21.🏋️ A force of 490 N did 490 J of work. How many metres did the object move?
  22. 22.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  23. 23.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 370 N pushes a cart 3 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Pushing a crate 1 m took 480 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 290 N pushes a cart 2 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) more effort (d) no effort
  31. 31.🏋️ Pushing a crate 10 m took 2900 J of work. What force was used, in newtons?
  32. 32.🏋️ Pushing a crate 10 m took 800 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 160 N pushes a cart 9 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 3 m took 330 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 1 m took 80 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 400 N pushes a cart 6 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 90 N did 720 J of work. How many metres did the object move?

Answer key

  1. 140
  2. 20
  3. 4
  4. 2
  5. 660
  6. 240
  7. joule (J)
  8. 7
  9. 550
  10. 2000
  11. no, work stays the same
  12. 10
  13. 6
  14. 140
  15. 2250
  16. 1
  17. 500
  18. 500
  19. through a distance
  20. 1
  21. 1
  22. load ÷ effort
  23. 200
  24. 950
  25. 4
  26. 4
  27. 1110
  28. 480
  29. 580
  30. less effort
  31. 290
  32. 80
  33. 1440
  34. 110
  35. 80
  36. 2400
  37. 1000
  38. 500
  39. 6
  40. 8

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