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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 643 · 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 10 N pushes a cart 7 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A 20 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  7. 7.🏋️ A force of 320 N did 960 J of work. How many metres did the object move?
  8. 8.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
  10. 10.🏋️ 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?
  11. 11.🏋️ A force of 80 N did 400 J of work. How many metres did the object move?
  12. 12.🏋️ Pushing a crate 2 m took 200 J of work. What force was used, in newtons?
  13. 13.🏋️ Pushing a crate 3 m took 60 J of work. What force was used, in newtons?
  14. 14.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 360 N did 1440 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 270 N did 270 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 490 N did 1470 J of work. How many metres did the object move?
  19. 19.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A 14 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ Pushing a crate 8 m took 2880 J of work. What force was used, in newtons?
  23. 23.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A force of 390 N pushes a cart 2 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ An 8 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ Pushing a crate 2 m took 100 J of work. What force was used, in newtons?
  29. 29.🏋️ A 19 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 330 N did 660 J of work. How many metres did the object move?
  32. 32.🏋️ 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?
  33. 33.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) no, work stays the same (d) yes, by half
  34. 34.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A 5 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 450 N pushes a cart 5 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?

Answer key

  1. 70
  2. 5
  3. 400
  4. 4
  5. 20
  6. through a distance
  7. 3
  8. 2
  9. less effort
  10. 110
  11. 5
  12. 100
  13. 20
  14. 5
  15. 2
  16. 4
  17. 1
  18. 3
  19. 6
  20. 560
  21. 400
  22. 360
  23. 3
  24. 780
  25. 2
  26. 6
  27. 80
  28. 50
  29. 950
  30. 900
  31. 2
  32. 30
  33. no, work stays the same
  34. 3
  35. 150
  36. 2250
  37. 160
  38. 950
  39. 150
  40. 5

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