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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 894 · 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.

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  1. 1.🏋️ A force of 310 N pushes a cart 3 m along the floor. How much work is done, in joules?
  2. 2.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
  3. 3.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A force of 110 N pushes a cart 10 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 10 N pushes a cart 3 m along the floor. How much work is done, in joules?
  6. 6.🏋️ Pushing a crate 3 m took 540 J of work. What force was used, in newtons?
  7. 7.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) no effort (d) more effort
  8. 8.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Pushing a crate 5 m took 1450 J of work. What force was used, in newtons?
  11. 11.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Pushing a crate 3 m took 1050 J of work. What force was used, in newtons?
  13. 13.🏋️ Pushing a crate 4 m took 800 J of work. What force was used, in newtons?
  14. 14.🏋️ 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?
  15. 15.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  16. 16.🏋️ Pushing a crate 3 m took 240 J of work. What force was used, in newtons?
  17. 17.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 150 N pushes a cart 3 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A force of 370 N pushes a cart 10 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Pushing a crate 10 m took 700 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 320 N did 1600 J of work. How many metres did the object move?
  27. 27.🏋️ Pushing a crate 3 m took 960 J of work. What force was used, in newtons?
  28. 28.🏋️ 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?
  29. 29.🏋️ Pushing a crate 6 m took 2640 J of work. What force was used, in newtons?
  30. 30.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 180 N pushes a cart 2 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ 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?
  34. 34.🏋️ Pushing a crate 5 m took 1500 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 170 N pushes a cart 7 m along the floor. How much work is done, in joules?
  36. 36.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
  37. 37.🏋️ Pushing a crate 5 m took 150 J of work. What force was used, in newtons?
  38. 38.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 270 N did 1890 J of work. How many metres did the object move?

Answer key

  1. 930
  2. joule (J)
  3. 280
  4. 1100
  5. 30
  6. 180
  7. less effort
  8. 850
  9. 6
  10. 290
  11. 5
  12. 350
  13. 200
  14. 30
  15. through a distance
  16. 80
  17. 6
  18. 450
  19. 400
  20. 2
  21. 750
  22. 450
  23. 600
  24. 3700
  25. 70
  26. 5
  27. 320
  28. 400
  29. 440
  30. 5
  31. 360
  32. 3
  33. 160
  34. 300
  35. 1190
  36. no, work stays the same
  37. 30
  38. 750
  39. 3
  40. 7

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