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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 768 · 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.🏋️ Pushing a crate 3 m took 300 J of work. What force was used, in newtons?
  2. 2.🏋️ A force of 30 N pushes a cart 4 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A force of 110 N pushes a cart 8 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) newton (N) (d) metre (m)
  7. 7.🏋️ Pushing a crate 9 m took 360 J of work. What force was used, in newtons?
  8. 8.🏋️ Pushing a crate 9 m took 720 J of work. What force was used, in newtons?
  9. 9.🏋️ Pushing a crate 8 m took 1680 J of work. What force was used, in newtons?
  10. 10.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
  11. 11.🏋️ Pushing a crate 3 m took 660 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 240 N pushes a cart 2 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 300 N pushes a cart 6 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 430 N pushes a cart 5 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 110 N did 220 J of work. How many metres did the object move?
  19. 19.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ Pushing a crate 8 m took 880 J of work. What force was used, in newtons?
  21. 21.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) no effort (d) more effort
  23. 23.🏋️ Pushing a crate 2 m took 360 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 340 N pushes a cart 1 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  26. 26.🏋️ Pushing a crate 2 m took 440 J of work. What force was used, in newtons?
  27. 27.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A 4 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.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, always (d) yes, by half
  30. 30.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ 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)
  33. 33.🏋️ A 19 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.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A 13 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ Pushing a crate 3 m took 1350 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 8 m took 960 J of work. What force was used, in newtons?
  38. 38.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 130 N did 910 J of work. How many metres did the object move?
  40. 40.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 100
  2. 120
  3. 250
  4. 880
  5. 1000
  6. joule (J)
  7. 40
  8. 80
  9. 210
  10. through a distance
  11. 220
  12. 480
  13. 1800
  14. 2150
  15. 950
  16. 5
  17. 5
  18. 2
  19. 6
  20. 110
  21. 2
  22. less effort
  23. 180
  24. 340
  25. load ÷ effort
  26. 220
  27. 6
  28. 80
  29. no, work stays the same
  30. 280
  31. 4
  32. 150
  33. 760
  34. 120
  35. 520
  36. 450
  37. 120
  38. 5
  39. 7
  40. 550

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