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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 156 · 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 290 N pushes a cart 1 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 420 N pushes a cart 1 m along the floor. How much work is done, in joules?
  3. 3.🏋️ 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
  4. 4.🏋️ Pushing a crate 9 m took 1080 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 120 N pushes a cart 1 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A force of 100 N did 500 J of work. How many metres did the object move?
  8. 8.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 210 N pushes a cart 8 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 440 N pushes a cart 3 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 190 N pushes a cart 9 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
  14. 14.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  15. 15.🏋️ A force of 150 N pushes a cart 6 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ Pushing a crate 2 m took 380 J of work. What force was used, in newtons?
  19. 19.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  20. 20.🏋️ A force of 320 N pushes a cart 2 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 160 N pushes a cart 9 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 340 N did 2380 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 350 N pushes a cart 10 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 1 m took 30 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 220 N did 1760 J of work. How many metres did the object move?
  26. 26.🏋️ A force of 460 N pushes a cart 5 m along the floor. How much work is done, in joules?
  27. 27.🏋️ 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?
  28. 28.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  29. 29.🏋️ A force of 120 N pushes a cart 10 m along the floor. How much work is done, in joules?
  30. 30.🏋️ An 18 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A force of 120 N pushes a cart 8 m along the floor. How much work is done, in joules?
  32. 32.🏋️ An 11 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A force of 150 N pushes a cart 10 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 110 N pushes a cart 8 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Pushing a crate 1 m took 60 J of work. What force was used, in newtons?
  38. 38.🏋️ A 2 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.🏋️ Pushing a crate 7 m took 1540 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 160 N pushes a cart 3 m along the floor. How much work is done, in joules?

Answer key

  1. 290
  2. 420
  3. no, work stays the same
  4. 120
  5. 120
  6. 350
  7. 5
  8. 6
  9. 1680
  10. 1320
  11. 1710
  12. 2
  13. through a distance
  14. joule (J)
  15. 900
  16. 4
  17. 6
  18. 190
  19. less effort
  20. 640
  21. 1440
  22. 7
  23. 3500
  24. 30
  25. 8
  26. 2300
  27. 200
  28. load ÷ effort
  29. 1200
  30. 180
  31. 960
  32. 440
  33. 1500
  34. 5
  35. 2
  36. 880
  37. 60
  38. 40
  39. 220
  40. 480

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