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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 285 · 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 110 N did 440 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 120 N pushes a cart 1 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 330 N did 1980 J of work. How many metres did the object move?
  4. 4.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  5. 5.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A machine lifts a load of 480 N when you push with 120 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ 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?
  9. 9.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
  11. 11.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 150 N did 900 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 320 N did 320 J of work. How many metres did the object move?
  15. 15.🏋️ 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)
  16. 16.🏋️ A force of 280 N pushes a cart 6 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 290 N pushes a cart 8 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  19. 19.🏋️ A force of 170 N pushes a cart 5 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 250 N pushes a cart 5 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 330 N did 2310 J of work. How many metres did the object move?
  24. 24.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A force of 110 N pushes a cart 3 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 300 N did 300 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 390 N pushes a cart 8 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 320 N pushes a cart 3 m along the floor. How much work is done, in joules?
  31. 31.🏋️ 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)
  32. 32.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ Pushing a crate 10 m took 2800 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 180 N pushes a cart 6 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 100 N pushes a cart 4 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 150 N pushes a cart 3 m along the floor. How much work is done, in joules?
  37. 37.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
  38. 38.🏋️ A 12 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A force of 150 N pushes a cart 5 m along the floor. How much work is done, in joules?
  40. 40.🏋️ Pushing a crate 6 m took 2040 J of work. What force was used, in newtons?

Answer key

  1. 4
  2. 120
  3. 6
  4. less effort
  5. 2
  6. 4
  7. 5
  8. 120
  9. 20
  10. load ÷ effort
  11. 1000
  12. 3
  13. 6
  14. 1
  15. 350
  16. 1680
  17. 2320
  18. through a distance
  19. 850
  20. 550
  21. 6
  22. 1250
  23. 7
  24. 750
  25. 330
  26. 4
  27. 1
  28. 3120
  29. 2
  30. 960
  31. 700
  32. 4
  33. 280
  34. 1080
  35. 400
  36. 450
  37. joule (J)
  38. 360
  39. 750
  40. 340

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