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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 695 · 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.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) effort ÷ load (d) load + effort
  2. 2.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  3. 3.🏋️ Pushing a crate 8 m took 2480 J of work. What force was used, in newtons?
  4. 4.🏋️ A force of 50 N pushes a cart 6 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 100 N did 200 J of work. How many metres did the object move?
  6. 6.🏋️ Pushing a crate 1 m took 110 J of work. What force was used, in newtons?
  7. 7.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ Pushing a crate 3 m took 840 J of work. What force was used, in newtons?
  9. 9.🏋️ A force of 120 N pushes a cart 10 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 270 N did 1890 J of work. How many metres did the object move?
  11. 11.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) very slowly (d) only upwards
  12. 12.🏋️ A 19 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ Pushing a crate 8 m took 640 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 330 N pushes a cart 5 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A force of 340 N pushes a cart 10 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ Pushing a crate 10 m took 1200 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 30 N did 150 J of work. How many metres did the object move?
  25. 25.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ Pushing a crate 3 m took 270 J of work. What force was used, in newtons?
  28. 28.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A 3 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ Pushing a crate 7 m took 770 J of work. What force was used, in newtons?
  31. 31.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) no, work stays the same (d) only on Mondays
  32. 32.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A 16 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A force of 80 N did 560 J of work. How many metres did the object move?
  36. 36.🏋️ Pushing a crate 2 m took 260 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 90 N did 540 J of work. How many metres did the object move?
  38. 38.🏋️ 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?
  39. 39.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ 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)

Answer key

  1. load ÷ effort
  2. less effort
  3. 310
  4. 300
  5. 2
  6. 110
  7. 3
  8. 280
  9. 1200
  10. 7
  11. through a distance
  12. 950
  13. 5
  14. 80
  15. 1650
  16. 2
  17. 2
  18. 280
  19. 3400
  20. 4
  21. 4
  22. 800
  23. 120
  24. 5
  25. 6
  26. 650
  27. 90
  28. 600
  29. 30
  30. 110
  31. no, work stays the same
  32. 5
  33. 900
  34. 480
  35. 7
  36. 130
  37. 6
  38. 130
  39. 400
  40. 1000

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