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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 705 · 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 force of 10 N pushes a cart 2 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 60 N pushes a cart 7 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A force of 20 N pushes a cart 2 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 350 N pushes a cart 1 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A force of 270 N pushes a cart 5 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Pushing a crate 2 m took 280 J of work. What force was used, in newtons?
  8. 8.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 40 N did 360 J of work. How many metres did the object move?
  10. 10.🏋️ A force of 130 N pushes a cart 10 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 420 N pushes a cart 8 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 260 N pushes a cart 3 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 460 N pushes a cart 9 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
  15. 15.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
  16. 16.🏋️ A force of 250 N pushes a cart 10 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 50 N pushes a cart 6 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ Pushing a crate 2 m took 680 J of work. What force was used, in newtons?
  20. 20.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  21. 21.🏋️ A force of 270 N pushes a cart 3 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Pushing a crate 1 m took 90 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 80 N pushes a cart 10 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A 12 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 180 N pushes a cart 8 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 150 N pushes a cart 2 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  31. 31.🏋️ Pushing a crate 4 m took 240 J of work. What force was used, in newtons?
  32. 32.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ Pushing a crate 10 m took 4000 J of work. What force was used, in newtons?
  34. 34.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ 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)
  37. 37.🏋️ Pushing a crate 2 m took 60 J of work. What force was used, in newtons?
  38. 38.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same

Answer key

  1. 20
  2. 420
  3. 300
  4. 40
  5. 350
  6. 1350
  7. 140
  8. 4
  9. 9
  10. 1300
  11. 3360
  12. 780
  13. 4140
  14. through a distance
  15. joule (J)
  16. 2500
  17. 300
  18. 3
  19. 340
  20. load ÷ effort
  21. 810
  22. 90
  23. 800
  24. 480
  25. 720
  26. 950
  27. 1440
  28. 300
  29. 750
  30. less effort
  31. 60
  32. 550
  33. 400
  34. 120
  35. 4
  36. 100
  37. 30
  38. 2
  39. 4
  40. no, work stays the same

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