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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 873 · 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, by half (b) only on Mondays (c) yes, always (d) no, work stays the same
  2. 2.🏋️ A 20 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ A force of 60 N pushes a cart 9 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
  6. 6.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ 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?
  8. 8.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Pushing a crate 1 m took 470 J of work. What force was used, in newtons?
  10. 10.🏋️ Pushing a crate 1 m took 230 J of work. What force was used, in newtons?
  11. 11.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  12. 12.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  13. 13.🏋️ A force of 390 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A 19 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 210 N did 2100 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 120 N pushes a cart 1 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Pushing a crate 7 m took 910 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 170 N did 1020 J of work. How many metres did the object move?
  20. 20.🏋️ A 1 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.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 180 N pushes a cart 7 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 180 N pushes a cart 8 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ 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?
  26. 26.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  30. 30.🏋️ Pushing a crate 3 m took 1470 J of work. What force was used, in newtons?
  31. 31.🏋️ 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)
  32. 32.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ Pushing a crate 7 m took 770 J of work. What force was used, in newtons?
  34. 34.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A force of 450 N did 2700 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 80 N pushes a cart 3 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 180 N did 180 J of work. How many metres did the object move?
  38. 38.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 160 N did 800 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 480 N did 3360 J of work. How many metres did the object move?

Answer key

  1. no, work stays the same
  2. 600
  3. 540
  4. 2
  5. joule (J)
  6. 800
  7. 150
  8. 2
  9. 470
  10. 230
  11. load ÷ effort
  12. less effort
  13. 780
  14. 950
  15. 2
  16. 10
  17. 120
  18. 130
  19. 6
  20. 20
  21. 3
  22. 1260
  23. 1440
  24. 120
  25. 140
  26. 550
  27. 400
  28. 850
  29. through a distance
  30. 490
  31. 50
  32. 3
  33. 110
  34. 80
  35. 6
  36. 240
  37. 1
  38. 5
  39. 5
  40. 7

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