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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 964 · 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 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ Pushing a crate 2 m took 140 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 240 N did 1440 J of work. How many metres did the object move?
  4. 4.🏋️ A force of 330 N did 1980 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 480 N pushes a cart 8 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
  8. 8.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  10. 10.🏋️ A force of 210 N pushes a cart 3 m along the floor. How much work is done, in joules?
  11. 11.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  12. 12.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
  14. 14.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  16. 16.🏋️ A force of 140 N pushes a cart 4 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A force of 60 N did 60 J of work. How many metres did the object move?
  20. 20.🏋️ A force of 30 N pushes a cart 10 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 230 N pushes a cart 5 m along the floor. How much work is done, in joules?
  22. 22.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A force of 280 N did 1400 J of work. How many metres did the object move?
  24. 24.🏋️ 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?
  25. 25.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ Pushing a crate 2 m took 780 J of work. What force was used, in newtons?
  28. 28.🏋️ Pushing a crate 5 m took 1150 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 1 m took 230 J of work. What force was used, in newtons?
  30. 30.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ Pushing a crate 5 m took 1250 J of work. What force was used, in newtons?
  32. 32.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 320 N pushes a cart 6 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 220 N pushes a cart 2 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A force of 50 N did 350 J of work. How many metres did the object move?
  37. 37.🏋️ Pushing a crate 1 m took 320 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 390 N did 780 J of work. How many metres did the object move?
  39. 39.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A force of 110 N pushes a cart 5 m along the floor. How much work is done, in joules?

Answer key

  1. 120
  2. 70
  3. 6
  4. 6
  5. 3840
  6. 6
  7. less effort
  8. 5
  9. no, work stays the same
  10. 630
  11. load ÷ effort
  12. 750
  13. joule (J)
  14. 650
  15. through a distance
  16. 560
  17. 5
  18. 50
  19. 1
  20. 300
  21. 1150
  22. 320
  23. 5
  24. 110
  25. 3
  26. 3
  27. 390
  28. 230
  29. 230
  30. 3
  31. 250
  32. 4
  33. 1920
  34. 440
  35. 90
  36. 7
  37. 320
  38. 2
  39. 100
  40. 550

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