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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 154 · 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 390 N pushes a cart 4 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
  3. 3.🏋️ A force of 110 N pushes a cart 3 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 250 N did 2500 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 140 N did 1120 J of work. How many metres did the object move?
  6. 6.🏋️ Pushing a crate 1 m took 320 J of work. What force was used, in newtons?
  7. 7.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A force of 100 N did 900 J of work. How many metres did the object move?
  9. 9.🏋️ Pushing a crate 9 m took 360 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 230 N pushes a cart 5 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Pushing a crate 2 m took 580 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 130 N pushes a cart 8 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Pushing a crate 5 m took 750 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 210 N pushes a cart 7 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 60 N did 540 J of work. How many metres did the object move?
  17. 17.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  19. 19.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  20. 20.🏋️ A 3 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 120 N pushes a cart 10 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
  24. 24.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) load + effort (d) effort ÷ load
  25. 25.🏋️ A force of 230 N did 1380 J of work. How many metres did the object move?
  26. 26.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ Pushing a crate 5 m took 600 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 190 N pushes a cart 1 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 3 m took 150 J of work. What force was used, in newtons?
  31. 31.🏋️ Pushing a crate 5 m took 900 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 480 N did 3840 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 90 N pushes a cart 6 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 440 N did 1320 J of work. How many metres did the object move?

Answer key

  1. 1560
  2. no, work stays the same
  3. 330
  4. 10
  5. 8
  6. 320
  7. 400
  8. 9
  9. 40
  10. 1150
  11. 2
  12. 290
  13. 1040
  14. 150
  15. 1470
  16. 9
  17. 100
  18. joule (J)
  19. through a distance
  20. 60
  21. 550
  22. 1200
  23. less effort
  24. load ÷ effort
  25. 6
  26. 20
  27. 2
  28. 120
  29. 190
  30. 50
  31. 180
  32. 8
  33. 540
  34. 700
  35. 2
  36. 100
  37. 100
  38. 100
  39. 350
  40. 3

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