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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 920 · 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.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  2. 2.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A 19 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A force of 130 N did 130 J of work. How many metres did the object move?
  5. 5.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
  6. 6.🏋️ Pushing a crate 2 m took 220 J of work. What force was used, in newtons?
  7. 7.🏋️ Pushing a crate 8 m took 1680 J of work. What force was used, in newtons?
  8. 8.🏋️ Pushing a crate 9 m took 1890 J of work. What force was used, in newtons?
  9. 9.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  10. 10.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ Pushing a crate 7 m took 280 J of work. What force was used, in newtons?
  12. 12.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  13. 13.🏋️ A force of 80 N pushes a cart 10 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 20 N pushes a cart 1 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 160 N did 160 J of work. How many metres did the object move?
  18. 18.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 410 N pushes a cart 6 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 400 N pushes a cart 6 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 260 N did 1300 J of work. How many metres did the object move?
  22. 22.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 20 N did 40 J of work. How many metres did the object move?
  26. 26.🏋️ A force of 210 N did 1680 J of work. How many metres did the object move?
  27. 27.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Pushing a crate 6 m took 1140 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 450 N did 450 J of work. How many metres did the object move?
  30. 30.🏋️ Pushing a crate 9 m took 540 J of work. What force was used, in newtons?
  31. 31.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 100 N pushes a cart 8 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 30 N pushes a cart 8 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A 10 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A force of 110 N did 1100 J of work. How many metres did the object move?
  38. 38.🏋️ 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)
  39. 39.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 150 N did 900 J of work. How many metres did the object move?

Answer key

  1. joule (J)
  2. 2
  3. 380
  4. 1
  5. less effort
  6. 110
  7. 210
  8. 210
  9. load ÷ effort
  10. 650
  11. 40
  12. through a distance
  13. 800
  14. 20
  15. 5
  16. 850
  17. 1
  18. 4
  19. 2460
  20. 2400
  21. 5
  22. 2
  23. 4
  24. 5
  25. 2
  26. 8
  27. 550
  28. 190
  29. 1
  30. 60
  31. 6
  32. 800
  33. 240
  34. 800
  35. 5
  36. 400
  37. 10
  38. 350
  39. 250
  40. 6

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