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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 109 · 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.

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  1. 1.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) without moving it (d) very slowly
  2. 2.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  3. 3.🏋️ A force of 260 N pushes a cart 2 m along the floor. How much work is done, in joules?
  4. 4.🏋️ 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
  5. 5.🏋️ Pushing a crate 1 m took 190 J of work. What force was used, in newtons?
  6. 6.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
  8. 8.🏋️ A 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ Pushing a crate 1 m took 330 J of work. What force was used, in newtons?
  10. 10.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ Pushing a crate 10 m took 3800 J of work. What force was used, in newtons?
  12. 12.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 80 N did 240 J of work. How many metres did the object move?
  14. 14.🏋️ 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?
  15. 15.🏋️ A 19 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 380 N did 380 J of work. How many metres did the object move?
  18. 18.🏋️ Pushing a crate 7 m took 1190 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 340 N pushes a cart 8 m along the floor. How much work is done, in joules?
  20. 20.🏋️ An 8 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A force of 100 N pushes a cart 3 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 150 N pushes a cart 3 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A force of 190 N pushes a cart 8 m along the floor. How much work is done, in joules?
  25. 25.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ Pushing a crate 3 m took 210 J of work. What force was used, in newtons?
  27. 27.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) watt hour (d) metre (m)
  28. 28.🏋️ A force of 70 N did 630 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 320 N pushes a cart 2 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 80 N pushes a cart 6 m along the floor. How much work is done, in joules?
  31. 31.🏋️ Pushing a crate 6 m took 1740 J of work. What force was used, in newtons?
  32. 32.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 140 N pushes a cart 10 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 9 m took 1260 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 30 N did 60 J of work. How many metres did the object move?
  36. 36.🏋️ Pushing a crate 8 m took 4000 J of work. What force was used, in newtons?
  37. 37.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 60 N did 300 J of work. How many metres did the object move?
  39. 39.🏋️ A 19 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 smooth ramp is 3 m long and rises 1 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. through a distance
  2. less effort
  3. 520
  4. no, work stays the same
  5. 190
  6. 50
  7. load ÷ effort
  8. 240
  9. 330
  10. 4
  11. 380
  12. 5
  13. 3
  14. 800
  15. 760
  16. 550
  17. 1
  18. 170
  19. 2720
  20. 240
  21. 300
  22. 450
  23. 3
  24. 1520
  25. 320
  26. 70
  27. joule (J)
  28. 9
  29. 640
  30. 480
  31. 290
  32. 4
  33. 1400
  34. 140
  35. 2
  36. 500
  37. 900
  38. 5
  39. 380
  40. 650

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