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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 746 · 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 force of 130 N did 130 J of work. How many metres did the object move?
  3. 3.🏋️ A 1 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 smooth ramp is 9 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ 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?
  7. 7.🏋️ A force of 320 N pushes a cart 5 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A force of 50 N pushes a cart 8 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 70 N pushes a cart 6 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Pushing a crate 3 m took 1440 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 300 N pushes a cart 9 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
  14. 14.🏋️ A force of 70 N pushes a cart 7 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  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 90 N pushes a cart 6 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 120 N pushes a cart 3 m along the floor. How much work is done, in joules?
  20. 20.🏋️ Pushing a crate 9 m took 900 J of work. What force was used, in newtons?
  21. 21.🏋️ Pushing a crate 4 m took 1360 J of work. What force was used, in newtons?
  22. 22.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  23. 23.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 280 N did 280 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 250 N did 1250 J of work. How many metres did the object move?
  26. 26.🏋️ Pushing a crate 2 m took 340 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 60 N pushes a cart 4 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 110 N did 550 J of work. How many metres did the object move?
  31. 31.🏋️ Pushing a crate 10 m took 5000 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 110 N pushes a cart 8 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  34. 34.🏋️ Pushing a crate 3 m took 1290 J of work. What force was used, in newtons?
  35. 35.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 30 N pushes a cart 10 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
  38. 38.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 2
  2. 1
  3. 40
  4. 200
  5. 3
  6. 50
  7. 1600
  8. 400
  9. 420
  10. 480
  11. 2700
  12. 100
  13. joule (J)
  14. 490
  15. 400
  16. through a distance
  17. 6
  18. 540
  19. 360
  20. 100
  21. 340
  22. less effort
  23. 200
  24. 1
  25. 5
  26. 170
  27. 240
  28. 40
  29. 2
  30. 5
  31. 500
  32. 880
  33. no, work stays the same
  34. 430
  35. 6
  36. 300
  37. load ÷ effort
  38. 3
  39. 3
  40. 550

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