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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 121 · 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 machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 10 N did 100 J of work. How many metres did the object move?
  3. 3.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  4. 4.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Pushing a crate 2 m took 320 J of work. What force was used, in newtons?
  6. 6.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
  7. 7.🏋️ Pushing a crate 3 m took 1410 J of work. What force was used, in newtons?
  8. 8.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ 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)
  11. 11.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 300 N did 2700 J of work. How many metres did the object move?
  14. 14.🏋️ Pushing a crate 8 m took 400 J of work. What force was used, in newtons?
  15. 15.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
  16. 16.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 70 N pushes a cart 2 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Pushing a crate 6 m took 2340 J of work. What force was used, in newtons?
  20. 20.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  25. 25.🏋️ A force of 490 N did 980 J of work. How many metres did the object move?
  26. 26.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Pushing a crate 1 m took 10 J of work. What force was used, in newtons?
  29. 29.🏋️ A 5 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 8 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ 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?
  32. 32.🏋️ A force of 10 N pushes a cart 10 m along the floor. How much work is done, in joules?
  33. 33.🏋️ 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?
  34. 34.🏋️ A force of 50 N pushes a cart 1 m along the floor. How much work is done, in joules?
  35. 35.🏋️ Pushing a crate 3 m took 1350 J of work. What force was used, in newtons?
  36. 36.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A force of 360 N did 1440 J of work. How many metres did the object move?
  38. 38.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) the same effort (d) no effort
  40. 40.🏋️ A force of 40 N pushes a cart 5 m along the floor. How much work is done, in joules?

Answer key

  1. 2
  2. 10
  3. through a distance
  4. 6
  5. 160
  6. load ÷ effort
  7. 470
  8. 50
  9. 640
  10. 200
  11. 4
  12. 3
  13. 9
  14. 50
  15. no, work stays the same
  16. 2
  17. 750
  18. 140
  19. 390
  20. 6
  21. 600
  22. 60
  23. 2
  24. joule (J)
  25. 2
  26. 800
  27. 900
  28. 10
  29. 250
  30. 150
  31. 160
  32. 100
  33. 10
  34. 50
  35. 450
  36. 100
  37. 4
  38. 600
  39. less effort
  40. 200

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