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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 529 · 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.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) only on Mondays (d) yes, by half
  2. 2.🏋️ A force of 290 N did 2610 J of work. How many metres did the object move?
  3. 3.🏋️ A force of 240 N did 480 J of work. How many metres did the object move?
  4. 4.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  5. 5.🏋️ Pushing a crate 3 m took 990 J of work. What force was used, in newtons?
  6. 6.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 200 N did 1200 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 440 N pushes a cart 10 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
  10. 10.🏋️ 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?
  11. 11.🏋️ A force of 180 N pushes a cart 8 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 450 N pushes a cart 9 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 220 N did 220 J of work. How many metres did the object move?
  14. 14.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A 17 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A 16 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 340 N pushes a cart 2 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 140 N pushes a cart 6 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  26. 26.🏋️ Pushing a crate 3 m took 600 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 140 N did 420 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 380 N pushes a cart 3 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Pushing a crate 10 m took 900 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 30 N pushes a cart 4 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 250 N pushes a cart 9 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Pushing a crate 5 m took 450 J of work. What force was used, in newtons?
  34. 34.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) watt hour (d) metre (m)
  36. 36.🏋️ Pushing a crate 1 m took 270 J of work. What force was used, in newtons?
  37. 37.🏋️ A 5 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 machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ Pushing a crate 3 m took 210 J of work. What force was used, in newtons?

Answer key

  1. no, work stays the same
  2. 9
  3. 2
  4. less effort
  5. 330
  6. 5
  7. 6
  8. 4400
  9. through a distance
  10. 240
  11. 1440
  12. 4050
  13. 1
  14. 750
  15. 6
  16. 5
  17. 2
  18. 680
  19. 160
  20. 680
  21. 800
  22. 2
  23. 840
  24. 2
  25. load ÷ effort
  26. 200
  27. 3
  28. 1140
  29. 90
  30. 120
  31. 200
  32. 2250
  33. 90
  34. 50
  35. joule (J)
  36. 270
  37. 200
  38. 5
  39. 4
  40. 70

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