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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 945 · 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 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  3. 3.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
  4. 4.🏋️ A force of 70 N pushes a cart 3 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 140 N did 140 J of work. How many metres did the object move?
  6. 6.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 110 N did 770 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 450 N pushes a cart 7 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ Pushing a crate 5 m took 2250 J of work. What force was used, in newtons?
  12. 12.🏋️ Pushing a crate 1 m took 500 J of work. What force was used, in newtons?
  13. 13.🏋️ Pushing a crate 8 m took 720 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 460 N pushes a cart 8 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A force of 460 N pushes a cart 2 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 390 N did 3510 J of work. How many metres did the object move?
  17. 17.🏋️ 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?
  18. 18.🏋️ A force of 340 N pushes a cart 3 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
  20. 20.🏋️ A 7 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ Pushing a crate 1 m took 150 J of work. What force was used, in newtons?
  22. 22.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
  23. 23.🏋️ 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?
  24. 24.🏋️ A force of 220 N did 440 J of work. How many metres did the object move?
  25. 25.🏋️ Pushing a crate 9 m took 1440 J of work. What force was used, in newtons?
  26. 26.🏋️ 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)
  27. 27.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A force of 150 N pushes a cart 7 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 200 N pushes a cart 1 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 90 N did 270 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 400 N pushes a cart 6 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A force of 470 N pushes a cart 7 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 310 N pushes a cart 3 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 70 N did 140 J of work. How many metres did the object move?
  37. 37.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ 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?
  39. 39.🏋️ A force of 150 N did 750 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 220 N did 1320 J of work. How many metres did the object move?

Answer key

  1. 2
  2. less effort
  3. no, work stays the same
  4. 210
  5. 1
  6. 2
  7. 7
  8. 3150
  9. 600
  10. 900
  11. 450
  12. 500
  13. 90
  14. 3680
  15. 920
  16. 9
  17. 10
  18. 1020
  19. through a distance
  20. 350
  21. 150
  22. joule (J)
  23. 400
  24. 2
  25. 160
  26. 300
  27. 200
  28. 1050
  29. 200
  30. 3
  31. 2400
  32. 180
  33. 3290
  34. 930
  35. 2
  36. 2
  37. 6
  38. 30
  39. 5
  40. 6

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