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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 9 · 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.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A 17 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ Pushing a crate 3 m took 1080 J of work. What force was used, in newtons?
  4. 4.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  5. 5.🏋️ A force of 270 N did 1350 J of work. How many metres did the object move?
  6. 6.🏋️ Pushing a crate 8 m took 320 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 130 N did 260 J of work. How many metres did the object move?
  8. 8.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  9. 9.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 300 N pushes a cart 10 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 360 N did 3600 J of work. How many metres did the object move?
  12. 12.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
  13. 13.🏋️ Pushing a crate 4 m took 560 J of work. What force was used, in newtons?
  14. 14.🏋️ Pushing a crate 8 m took 2960 J of work. What force was used, in newtons?
  15. 15.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ Pushing a crate 8 m took 3200 J of work. What force was used, in newtons?
  18. 18.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 10 N did 10 J of work. How many metres did the object move?
  23. 23.🏋️ 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?
  24. 24.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A force of 290 N did 2610 J of work. How many metres did the object move?
  27. 27.🏋️ Pushing a crate 9 m took 720 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 490 N pushes a cart 10 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
  30. 30.🏋️ A force of 100 N pushes a cart 4 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 400 N pushes a cart 7 m along the floor. How much work is done, in joules?
  33. 33.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A force of 270 N pushes a cart 2 m along the floor. How much work is done, in joules?
  35. 35.🏋️ 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?
  36. 36.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ Pushing a crate 5 m took 500 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 90 N did 270 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 180 N pushes a cart 6 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A 12 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 900
  2. 340
  3. 360
  4. through a distance
  5. 5
  6. 40
  7. 2
  8. less effort
  9. 750
  10. 3000
  11. 10
  12. load ÷ effort
  13. 140
  14. 370
  15. 900
  16. 3
  17. 400
  18. 3
  19. 400
  20. 280
  21. 350
  22. 1
  23. 100
  24. 2
  25. 190
  26. 9
  27. 80
  28. 4900
  29. no, work stays the same
  30. 400
  31. 6
  32. 2800
  33. 360
  34. 540
  35. 160
  36. 950
  37. 100
  38. 3
  39. 1080
  40. 360

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