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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 688 · 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 8 m took 160 J of work. What force was used, in newtons?
  2. 2.🏋️ A force of 50 N pushes a cart 2 m along the floor. How much work is done, in joules?
  3. 3.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load + effort (d) load × effort
  4. 4.🏋️ Pushing a crate 7 m took 350 J of work. What force was used, in newtons?
  5. 5.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A force of 40 N pushes a cart 9 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 450 N did 1350 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 70 N pushes a cart 1 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 80 N pushes a cart 5 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 120 N did 720 J of work. How many metres did the object move?
  11. 11.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
  12. 12.🏋️ A 5 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A force of 330 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 160 N pushes a cart 3 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A force of 30 N pushes a cart 2 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ Pushing a crate 8 m took 1760 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 150 N pushes a cart 1 m along the floor. How much work is done, in joules?
  19. 19.🏋️ 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
  20. 20.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
  22. 22.🏋️ A force of 440 N pushes a cart 3 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A 17 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A force of 90 N did 360 J of work. How many metres did the object move?
  25. 25.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) less effort (d) the same effort
  26. 26.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 490 N pushes a cart 1 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 50 N did 350 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 450 N did 4500 J of work. How many metres did the object move?
  30. 30.🏋️ A 17 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A 9 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ 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?
  38. 38.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ Pushing a crate 6 m took 2640 J of work. What force was used, in newtons?
  40. 40.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?

Answer key

  1. 20
  2. 100
  3. load ÷ effort
  4. 50
  5. 5
  6. 360
  7. 3
  8. 70
  9. 400
  10. 6
  11. joule (J)
  12. 150
  13. 660
  14. 480
  15. 60
  16. 950
  17. 220
  18. 150
  19. no, work stays the same
  20. 140
  21. through a distance
  22. 1320
  23. 170
  24. 4
  25. less effort
  26. 2
  27. 490
  28. 7
  29. 10
  30. 340
  31. 3
  32. 650
  33. 5
  34. 100
  35. 6
  36. 360
  37. 90
  38. 800
  39. 440
  40. 3

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