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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 963 · 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 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?
  2. 2.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  3. 3.🏋️ Pushing a crate 2 m took 720 J of work. What force was used, in newtons?
  4. 4.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  8. 8.🏋️ A force of 360 N did 1080 J of work. How many metres did the object move?
  9. 9.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
  10. 10.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  14. 14.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 390 N did 3510 J of work. How many metres did the object move?
  16. 16.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 490 N did 980 J of work. How many metres did the object move?
  19. 19.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ Pushing a crate 1 m took 350 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 260 N pushes a cart 8 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Pushing a crate 5 m took 2300 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 480 N pushes a cart 4 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 80 N pushes a cart 4 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Pushing a crate 4 m took 1280 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 430 N did 1290 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 150 N did 1200 J of work. How many metres did the object move?
  28. 28.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 230 N pushes a cart 2 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 10 N pushes a cart 6 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 410 N did 2460 J of work. How many metres did the object move?
  32. 32.🏋️ A 14 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A 5 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A force of 490 N pushes a cart 4 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 350 N did 1400 J of work. How many metres did the object move?
  37. 37.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 20 N pushes a cart 1 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  40. 40.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 100
  2. no, work stays the same
  3. 360
  4. 3
  5. 20
  6. 450
  7. load ÷ effort
  8. 3
  9. through a distance
  10. 40
  11. 3
  12. 850
  13. joule (J)
  14. 100
  15. 9
  16. 150
  17. 4
  18. 2
  19. 3
  20. 350
  21. 2080
  22. 460
  23. 1920
  24. 320
  25. 320
  26. 3
  27. 8
  28. 250
  29. 460
  30. 60
  31. 6
  32. 700
  33. 3
  34. 250
  35. 1960
  36. 4
  37. 5
  38. 20
  39. less effort
  40. 150

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