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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 549 · 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 longer ramp to the same height needs … (a) less effort (b) no effort (c) more effort (d) the same effort
  2. 2.🏋️ Pushing a crate 10 m took 4200 J of work. What force was used, in newtons?
  3. 3.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 300 N did 300 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 190 N pushes a cart 1 m along the floor. How much work is done, in joules?
  6. 6.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
  7. 7.🏋️ An 8 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ 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
  9. 9.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ Pushing a crate 6 m took 60 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 80 N did 400 J of work. How many metres did the object move?
  13. 13.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 280 N did 1400 J of work. How many metres did the object move?
  15. 15.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  16. 16.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  17. 17.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ 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?
  19. 19.🏋️ A force of 310 N pushes a cart 9 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 170 N did 1530 J of work. How many metres did the object move?
  21. 21.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3900 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ Pushing a crate 8 m took 1520 J of work. What force was used, in newtons?
  23. 23.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A force of 500 N did 3500 J of work. How many metres did the object move?
  25. 25.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A force of 40 N did 200 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 290 N did 2320 J of work. How many metres did the object move?
  28. 28.🏋️ Pushing a crate 9 m took 1710 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 10 m took 800 J of work. What force was used, in newtons?
  30. 30.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 190 N did 570 J of work. How many metres did the object move?
  33. 33.🏋️ Pushing a crate 7 m took 3220 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 5 m took 2300 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 5 m took 500 J of work. What force was used, in newtons?
  36. 36.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 470 N did 2820 J of work. How many metres did the object move?
  38. 38.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 200 N pushes a cart 1 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 400 N pushes a cart 7 m along the floor. How much work is done, in joules?

Answer key

  1. less effort
  2. 420
  3. 6
  4. 1
  5. 190
  6. through a distance
  7. 80
  8. no, work stays the same
  9. 3
  10. 4
  11. 10
  12. 5
  13. 950
  14. 5
  15. joule (J)
  16. load ÷ effort
  17. 4
  18. 130
  19. 2790
  20. 9
  21. 650
  22. 190
  23. 5
  24. 7
  25. 6
  26. 5
  27. 8
  28. 190
  29. 80
  30. 5
  31. 160
  32. 3
  33. 460
  34. 460
  35. 100
  36. 5
  37. 6
  38. 850
  39. 200
  40. 2800

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