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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 809 · 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) yes, always (c) only on Mondays (d) no, work stays the same
  2. 2.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Pushing a crate 10 m took 3900 J of work. What force was used, in newtons?
  6. 6.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Pushing a crate 8 m took 1600 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 490 N pushes a cart 3 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 200 N pushes a cart 3 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  11. 11.🏋️ Pushing a crate 9 m took 540 J of work. What force was used, in newtons?
  12. 12.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  13. 13.🏋️ A force of 120 N pushes a cart 7 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 400 N did 1600 J of work. How many metres did the object move?
  15. 15.🏋️ Pushing a crate 7 m took 420 J of work. What force was used, in newtons?
  16. 16.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) load + effort (d) effort ÷ load
  18. 18.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ Pushing a crate 7 m took 210 J of work. What force was used, in newtons?
  21. 21.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ Pushing a crate 7 m took 3500 J of work. What force was used, in newtons?
  24. 24.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ Pushing a crate 3 m took 720 J of work. What force was used, in newtons?
  28. 28.🏋️ Pushing a crate 3 m took 300 J of work. What force was used, in newtons?
  29. 29.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  32. 32.🏋️ Pushing a crate 1 m took 80 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 430 N pushes a cart 1 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 360 N pushes a cart 9 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 130 N did 650 J of work. How many metres did the object move?
  36. 36.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?

Answer key

  1. no, work stays the same
  2. 5
  3. 300
  4. 2
  5. 390
  6. 3
  7. 200
  8. 1470
  9. 600
  10. less effort
  11. 60
  12. joule (J)
  13. 840
  14. 4
  15. 60
  16. 2
  17. load ÷ effort
  18. 5
  19. 250
  20. 30
  21. 160
  22. 4
  23. 500
  24. 700
  25. 3
  26. 600
  27. 240
  28. 100
  29. 6
  30. 800
  31. through a distance
  32. 80
  33. 430
  34. 3240
  35. 5
  36. 3
  37. 450
  38. 4
  39. 150
  40. 3

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