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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 551 · 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 longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  2. 2.🏋️ A force of 250 N did 2500 J of work. How many metres did the object move?
  3. 3.🏋️ 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?
  4. 4.🏋️ Pushing a crate 8 m took 1600 J of work. What force was used, in newtons?
  5. 5.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ Pushing a crate 1 m took 480 J of work. What force was used, in newtons?
  7. 7.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ Pushing a crate 8 m took 1120 J of work. What force was used, in newtons?
  9. 9.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Pushing a crate 5 m took 250 J of work. What force was used, in newtons?
  11. 11.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
  12. 12.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A force of 300 N pushes a cart 1 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ Pushing a crate 10 m took 400 J of work. What force was used, in newtons?
  16. 16.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) joule (J) (d) newton (N)
  17. 17.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 410 N pushes a cart 2 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 220 N did 2200 J of work. How many metres did the object move?
  20. 20.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 280 N pushes a cart 10 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
  25. 25.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
  27. 27.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A force of 440 N pushes a cart 2 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ 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)
  35. 35.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A force of 400 N did 2800 J of work. How many metres did the object move?
  38. 38.🏋️ 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)
  39. 39.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ Pushing a crate 9 m took 4410 J of work. What force was used, in newtons?

Answer key

  1. less effort
  2. 10
  3. 10
  4. 200
  5. 110
  6. 480
  7. 100
  8. 140
  9. 4
  10. 50
  11. through a distance
  12. 350
  13. 300
  14. 150
  15. 40
  16. joule (J)
  17. 5
  18. 820
  19. 10
  20. 2
  21. 2800
  22. 2
  23. 250
  24. load ÷ effort
  25. 90
  26. no, work stays the same
  27. 4
  28. 880
  29. 1000
  30. 500
  31. 80
  32. 4
  33. 200
  34. 100
  35. 150
  36. 50
  37. 7
  38. 100
  39. 300
  40. 490

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