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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 512 · 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 force of 210 N did 420 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 440 N pushes a cart 3 m along the floor. How much work is done, in joules?
  3. 3.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  4. 4.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Pushing a crate 9 m took 2610 J of work. What force was used, in newtons?
  6. 6.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  7. 7.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) effort ÷ load (d) load ÷ effort
  9. 9.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
  11. 11.🏋️ Pushing a crate 8 m took 2640 J of work. What force was used, in newtons?
  12. 12.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ 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?
  14. 14.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ Pushing a crate 3 m took 30 J of work. What force was used, in newtons?
  16. 16.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 250 N did 1000 J of work. How many metres did the object move?
  18. 18.🏋️ A 10 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 470 N pushes a cart 8 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ Pushing a crate 6 m took 2460 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 8 m took 560 J of work. What force was used, in newtons?
  23. 23.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A force of 40 N pushes a cart 8 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 110 N pushes a cart 6 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 270 N did 1620 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 350 N pushes a cart 1 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 480 N did 480 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 300 N did 600 J of work. How many metres did the object move?
  30. 30.🏋️ A machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ Pushing a crate 2 m took 160 J of work. What force was used, in newtons?
  32. 32.🏋️ Pushing a crate 5 m took 2500 J of work. What force was used, in newtons?
  33. 33.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ 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?
  35. 35.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 8 m took 2160 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 130 N pushes a cart 9 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 270 N did 1350 J of work. How many metres did the object move?
  39. 39.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A 17 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 2
  2. 1320
  3. through a distance
  4. 5
  5. 290
  6. no, work stays the same
  7. 100
  8. load ÷ effort
  9. 1000
  10. less effort
  11. 330
  12. 250
  13. 100
  14. 4
  15. 10
  16. 900
  17. 4
  18. 200
  19. 3760
  20. 180
  21. 410
  22. 70
  23. 5
  24. 320
  25. 660
  26. 6
  27. 350
  28. 1
  29. 2
  30. 4
  31. 80
  32. 500
  33. 110
  34. 50
  35. 4
  36. 270
  37. 1170
  38. 5
  39. 6
  40. 170

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