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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 954 · 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 90 N pushes a cart 5 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Pushing a crate 4 m took 440 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 270 N did 1890 J of work. How many metres did the object move?
  4. 4.🏋️ Pushing a crate 3 m took 180 J of work. What force was used, in newtons?
  5. 5.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  6. 6.🏋️ Pushing a crate 2 m took 440 J of work. What force was used, in newtons?
  7. 7.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Pushing a crate 5 m took 1550 J of work. What force was used, in newtons?
  10. 10.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  11. 11.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
  13. 13.🏋️ Pushing a crate 9 m took 2520 J of work. What force was used, in newtons?
  14. 14.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 60 N pushes a cart 9 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 120 N did 600 J of work. How many metres did the object move?
  19. 19.🏋️ Pushing a crate 2 m took 800 J of work. What force was used, in newtons?
  20. 20.🏋️ Pushing a crate 8 m took 1360 J of work. What force was used, in newtons?
  21. 21.🏋️ A 6 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.🏋️ Pushing a crate 3 m took 30 J of work. What force was used, in newtons?
  23. 23.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) only on Mondays (d) yes, by half
  26. 26.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ Pushing a crate 6 m took 900 J of work. What force was used, in newtons?
  29. 29.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ Pushing a crate 3 m took 1380 J of work. What force was used, in newtons?
  31. 31.🏋️ Pushing a crate 3 m took 1260 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 380 N did 1900 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 190 N pushes a cart 5 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A 13 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ Pushing a crate 9 m took 810 J of work. What force was used, in newtons?
  36. 36.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ 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?
  38. 38.🏋️ An 11 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A 14 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. 450
  2. 110
  3. 7
  4. 60
  5. less effort
  6. 220
  7. 50
  8. 600
  9. 310
  10. through a distance
  11. 250
  12. load ÷ effort
  13. 280
  14. 4
  15. 600
  16. 3
  17. 540
  18. 5
  19. 400
  20. 170
  21. 60
  22. 10
  23. 250
  24. 600
  25. no, work stays the same
  26. 6
  27. 500
  28. 150
  29. 600
  30. 460
  31. 420
  32. 5
  33. 950
  34. 260
  35. 90
  36. 4
  37. 110
  38. 220
  39. 2
  40. 420

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