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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 903 · 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, always (b) only on Mondays (c) no, work stays the same (d) yes, by half
  2. 2.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) joule (J) (d) newton (N)
  4. 4.🏋️ A force of 310 N pushes a cart 5 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A force of 20 N did 200 J of work. How many metres did the object move?
  7. 7.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
  10. 10.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 310 N pushes a cart 2 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
  15. 15.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) effort ÷ load (d) load ÷ effort
  16. 16.🏋️ Pushing a crate 2 m took 20 J of work. What force was used, in newtons?
  17. 17.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ Pushing a crate 3 m took 510 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 180 N pushes a cart 4 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ 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?
  24. 24.🏋️ A force of 340 N did 2040 J of work. How many metres did the object move?
  25. 25.🏋️ Pushing a crate 10 m took 900 J of work. What force was used, in newtons?
  26. 26.🏋️ 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?
  27. 27.🏋️ A force of 460 N did 1380 J of work. How many metres did the object move?
  28. 28.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 370 N pushes a cart 4 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 140 N pushes a cart 4 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 360 N pushes a cart 3 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 340 N did 1020 J of work. How many metres did the object move?
  34. 34.🏋️ Pushing a crate 9 m took 1620 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 9 m took 2160 J of work. What force was used, in newtons?
  36. 36.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ Pushing a crate 1 m took 160 J of work. What force was used, in newtons?
  39. 39.🏋️ 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?
  40. 40.🏋️ A 14 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. no, work stays the same
  2. 1000
  3. joule (J)
  4. 1550
  5. 6
  6. 10
  7. 180
  8. 150
  9. through a distance
  10. 2
  11. 620
  12. 5
  13. 300
  14. less effort
  15. load ÷ effort
  16. 10
  17. 4
  18. 250
  19. 170
  20. 720
  21. 300
  22. 100
  23. 130
  24. 6
  25. 90
  26. 60
  27. 3
  28. 250
  29. 1480
  30. 6
  31. 560
  32. 1080
  33. 3
  34. 180
  35. 240
  36. 5
  37. 50
  38. 160
  39. 240
  40. 560

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