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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 734 · 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 270 N pushes a cart 2 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Pushing a crate 3 m took 60 J of work. What force was used, in newtons?
  3. 3.🏋️ 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)
  4. 4.🏋️ Pushing a crate 5 m took 2100 J of work. What force was used, in newtons?
  5. 5.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A force of 270 N did 2430 J of work. How many metres did the object move?
  8. 8.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  9. 9.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 160 N pushes a cart 6 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 380 N pushes a cart 9 m along the floor. How much work is done, in joules?
  12. 12.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  13. 13.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  14. 14.🏋️ Pushing a crate 4 m took 2000 J of work. What force was used, in newtons?
  15. 15.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A force of 330 N did 2310 J of work. How many metres did the object move?
  18. 18.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ Pushing a crate 3 m took 120 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 320 N pushes a cart 6 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A smooth ramp is 12 m long and rises 3 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) only on Mondays (c) no, work stays the same (d) yes, by half
  26. 26.🏋️ A 5 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.🏋️ Pushing a crate 2 m took 880 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 100 N did 100 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 440 N pushes a cart 6 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 290 N pushes a cart 10 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 200 N did 1200 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 240 N did 1920 J of work. How many metres did the object move?
  33. 33.🏋️ 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?
  34. 34.🏋️ Pushing a crate 2 m took 500 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 10 m took 2700 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 200 N did 1400 J of work. How many metres did the object move?
  37. 37.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 360 N did 720 J of work. How many metres did the object move?
  40. 40.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort

Answer key

  1. 540
  2. 20
  3. 950
  4. 420
  5. 550
  6. 200
  7. 9
  8. through a distance
  9. 300
  10. 960
  11. 3420
  12. joule (J)
  13. less effort
  14. 500
  15. 4
  16. 20
  17. 7
  18. 150
  19. 2
  20. 6
  21. 40
  22. 1920
  23. 2
  24. 450
  25. no, work stays the same
  26. 50
  27. 440
  28. 1
  29. 2640
  30. 2900
  31. 6
  32. 8
  33. 160
  34. 250
  35. 270
  36. 7
  37. 3
  38. 5
  39. 2
  40. load ÷ effort

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