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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 610 · 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 460 N did 2760 J of work. How many metres did the object move?
  2. 2.🏋️ Pushing a crate 3 m took 1440 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 110 N pushes a cart 8 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A force of 500 N pushes a cart 1 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 90 N pushes a cart 4 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  9. 9.🏋️ Pushing a crate 2 m took 340 J of work. What force was used, in newtons?
  10. 10.🏋️ Pushing a crate 4 m took 40 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 300 N pushes a cart 10 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Pushing a crate 10 m took 1800 J of work. What force was used, in newtons?
  13. 13.🏋️ Pushing a crate 7 m took 70 J of work. What force was used, in newtons?
  14. 14.🏋️ 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?
  15. 15.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
  18. 18.🏋️ A force of 490 N pushes a cart 2 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 460 N pushes a cart 1 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 210 N pushes a cart 2 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 6 m took 2640 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 4 m took 1240 J of work. What force was used, in newtons?
  23. 23.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ Pushing a crate 2 m took 500 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 440 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) only on Mondays (d) yes, always
  28. 28.🏋️ A force of 90 N did 270 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 310 N did 1240 J of work. How many metres did the object move?
  30. 30.🏋️ A force of 130 N pushes a cart 4 m along the floor. How much work is done, in joules?
  31. 31.🏋️ Pushing a crate 7 m took 1120 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 240 N pushes a cart 8 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  34. 34.🏋️ A force of 160 N pushes a cart 10 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 230 N did 1150 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 390 N pushes a cart 8 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 100 N did 800 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 100 N did 300 J of work. How many metres did the object move?
  39. 39.🏋️ Pushing a crate 2 m took 900 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 270 N did 2430 J of work. How many metres did the object move?

Answer key

  1. 6
  2. 480
  3. 880
  4. 3
  5. 60
  6. 500
  7. 360
  8. less effort
  9. 170
  10. 10
  11. 3000
  12. 180
  13. 10
  14. 190
  15. 2
  16. 6
  17. through a distance
  18. 980
  19. 460
  20. 420
  21. 440
  22. 310
  23. 400
  24. 250
  25. 880
  26. 40
  27. no, work stays the same
  28. 3
  29. 4
  30. 520
  31. 160
  32. 1920
  33. load ÷ effort
  34. 1600
  35. 5
  36. 3120
  37. 8
  38. 3
  39. 450
  40. 9

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