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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 153 · 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 force of 290 N did 1740 J of work. How many metres did the object move?
  2. 2.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  3. 3.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  8. 8.🏋️ A force of 210 N pushes a cart 10 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
  10. 10.🏋️ Pushing a crate 6 m took 1620 J of work. What force was used, in newtons?
  11. 11.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A force of 150 N pushes a cart 10 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ 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?
  16. 16.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ Pushing a crate 9 m took 2250 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 200 N did 600 J of work. How many metres did the object move?
  19. 19.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ 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?
  22. 22.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 180 N did 1440 J of work. How many metres did the object move?
  24. 24.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  25. 25.🏋️ Pushing a crate 8 m took 1600 J of work. What force was used, in newtons?
  26. 26.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) load × effort (d) effort ÷ load
  27. 27.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A force of 350 N pushes a cart 3 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 10 m took 300 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 100 N did 600 J of work. How many metres did the object move?
  32. 32.🏋️ Pushing a crate 8 m took 3760 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 170 N did 1020 J of work. How many metres did the object move?
  34. 34.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 110 N did 880 J of work. How many metres did the object move?
  36. 36.🏋️ Pushing a crate 5 m took 250 J of work. What force was used, in newtons?
  37. 37.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 60 N pushes a cart 1 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A 10 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 6
  2. joule (J)
  3. 2
  4. 300
  5. 4
  6. 350
  7. through a distance
  8. 2100
  9. less effort
  10. 270
  11. 2
  12. 1500
  13. 2
  14. 4
  15. 500
  16. 60
  17. 250
  18. 3
  19. 6
  20. 2
  21. 80
  22. 6
  23. 8
  24. no, work stays the same
  25. 200
  26. load ÷ effort
  27. 2
  28. 280
  29. 1050
  30. 30
  31. 6
  32. 470
  33. 6
  34. 200
  35. 8
  36. 50
  37. 6
  38. 60
  39. 200
  40. 60

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