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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 223 · 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 machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ Pushing a crate 6 m took 2040 J of work. What force was used, in newtons?
  4. 4.🏋️ A 13 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) no effort (d) more effort
  6. 6.🏋️ An 11 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.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  8. 8.🏋️ 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?
  9. 9.🏋️ Pushing a crate 8 m took 3920 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 320 N pushes a cart 6 m along the floor. How much work is done, in joules?
  11. 11.🏋️ Pushing a crate 5 m took 1300 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 390 N pushes a cart 6 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
  15. 15.🏋️ A force of 70 N pushes a cart 6 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 120 N pushes a cart 9 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 310 N pushes a cart 4 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Pushing a crate 1 m took 40 J of work. What force was used, in newtons?
  19. 19.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A force of 370 N did 1110 J of work. How many metres did the object move?
  21. 21.🏋️ A 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A 20 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) load + effort (c) effort ÷ load (d) load ÷ effort
  24. 24.🏋️ A force of 300 N pushes a cart 1 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 100 N did 600 J of work. How many metres did the object move?
  26. 26.🏋️ Pushing a crate 2 m took 220 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 120 N did 360 J of work. How many metres did the object move?
  28. 28.🏋️ Pushing a crate 7 m took 280 J of work. What force was used, in newtons?
  29. 29.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A force of 470 N did 1880 J of work. How many metres did the object move?
  31. 31.🏋️ A 15 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 60 N pushes a cart 3 m along the floor. How much work is done, in joules?
  35. 35.🏋️ Pushing a crate 10 m took 3200 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 340 N did 2720 J of work. How many metres did the object move?
  37. 37.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  38. 38.🏋️ Pushing a crate 4 m took 600 J of work. What force was used, in newtons?
  39. 39.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 80 N did 480 J of work. How many metres did the object move?

Answer key

  1. 5
  2. 3
  3. 340
  4. 520
  5. less effort
  6. 550
  7. through a distance
  8. 40
  9. 490
  10. 1920
  11. 260
  12. 2340
  13. 2
  14. no, work stays the same
  15. 420
  16. 1080
  17. 1240
  18. 40
  19. 10
  20. 3
  21. 240
  22. 200
  23. load ÷ effort
  24. 300
  25. 6
  26. 110
  27. 3
  28. 40
  29. 80
  30. 4
  31. 300
  32. 150
  33. 800
  34. 180
  35. 320
  36. 8
  37. joule (J)
  38. 150
  39. 950
  40. 6

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