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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 637 · 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 smooth ramp is 3 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A force of 240 N pushes a cart 6 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 110 N pushes a cart 2 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 470 N pushes a cart 8 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
  6. 6.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A force of 240 N did 2160 J of work. How many metres did the object move?
  8. 8.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
  9. 9.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Pushing a crate 6 m took 60 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 270 N pushes a cart 2 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 390 N pushes a cart 1 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 400 N did 3200 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 240 N pushes a cart 2 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A force of 100 N did 800 J of work. How many metres did the object move?
  16. 16.🏋️ Pushing a crate 9 m took 2430 J of work. What force was used, in newtons?
  17. 17.🏋️ A force of 190 N did 1330 J of work. How many metres did the object move?
  18. 18.🏋️ Pushing a crate 8 m took 1920 J of work. What force was used, in newtons?
  19. 19.🏋️ Pushing a crate 9 m took 2160 J of work. What force was used, in newtons?
  20. 20.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 430 N did 1290 J of work. How many metres did the object move?
  22. 22.🏋️ 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?
  23. 23.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  24. 24.🏋️ Pushing a crate 2 m took 420 J of work. What force was used, in newtons?
  25. 25.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  26. 26.🏋️ A force of 390 N did 1950 J of work. How many metres did the object move?
  27. 27.🏋️ 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
  28. 28.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 130 N pushes a cart 8 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ Pushing a crate 5 m took 1600 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 130 N did 910 J of work. How many metres did the object move?
  33. 33.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A force of 470 N pushes a cart 6 m along the floor. How much work is done, in joules?
  35. 35.🏋️ Pushing a crate 7 m took 70 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 440 N did 3520 J of work. How many metres did the object move?
  37. 37.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ Pushing a crate 3 m took 330 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 210 N pushes a cart 6 m along the floor. How much work is done, in joules?

Answer key

  1. 700
  2. 1440
  3. 220
  4. 3760
  5. less effort
  6. 700
  7. 9
  8. joule (J)
  9. 2
  10. 10
  11. 540
  12. 390
  13. 8
  14. 480
  15. 8
  16. 270
  17. 7
  18. 240
  19. 240
  20. 6
  21. 3
  22. 30
  23. load ÷ effort
  24. 210
  25. through a distance
  26. 5
  27. no, work stays the same
  28. 4
  29. 1040
  30. 6
  31. 320
  32. 7
  33. 300
  34. 2820
  35. 10
  36. 8
  37. 800
  38. 400
  39. 110
  40. 1260

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