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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 66 · 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 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?
  2. 2.🏋️ Pushing a crate 9 m took 2340 J of work. What force was used, in newtons?
  3. 3.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
  4. 4.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  5. 5.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A force of 370 N did 2960 J of work. How many metres did the object move?
  7. 7.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ Pushing a crate 2 m took 800 J of work. What force was used, in newtons?
  9. 9.🏋️ 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
  10. 10.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A force of 210 N pushes a cart 1 m along the floor. How much work is done, in joules?
  13. 13.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  14. 14.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 140 N did 1400 J of work. How many metres did the object move?
  17. 17.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A force of 30 N pushes a cart 3 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 130 N did 520 J of work. How many metres did the object move?
  23. 23.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 460 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 110 N did 770 J of work. How many metres did the object move?
  28. 28.🏋️ Pushing a crate 10 m took 500 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 310 N pushes a cart 8 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 9 m took 1260 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 150 N pushes a cart 1 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 120 N did 1080 J of work. How many metres did the object move?
  33. 33.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4750 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 410 N did 2870 J of work. How many metres did the object move?
  37. 37.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ Pushing a crate 4 m took 680 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 60 N pushes a cart 1 m along the floor. How much work is done, in joules?
  40. 40.🏋️ Pushing a crate 6 m took 180 J of work. What force was used, in newtons?

Answer key

  1. 50
  2. 260
  3. load ÷ effort
  4. less effort
  5. 2
  6. 8
  7. 3
  8. 400
  9. no, work stays the same
  10. 1000
  11. 800
  12. 210
  13. through a distance
  14. 6
  15. 2
  16. 10
  17. 300
  18. 800
  19. 700
  20. 90
  21. 200
  22. 4
  23. 3
  24. 4
  25. 920
  26. 1000
  27. 7
  28. 50
  29. 2480
  30. 140
  31. 150
  32. 9
  33. 4
  34. 950
  35. 4
  36. 7
  37. 3
  38. 170
  39. 60
  40. 30

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