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Pulleys and Wheel and Axle Worksheet

Engineering lesson 14: Pulleys and the wheel and axle · Set 330 · 40 questions
TalentJR

Engineer's tip (Count the ropes): Fixed pulley: changes direction, effort = load. Pulley system: effort = load ÷ supporting rope sections; rope pulled = lift height × that number. Wheel and axle: MA = wheel radius ÷ axle radius; effort = load ÷ MA.

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  1. 1.🪝 More rope sections holding a load means … (a) no change (b) less effort needed (c) the load floats (d) more effort needed
  2. 2.True or false: a fixed pulley makes you pull 2× rope. (a) True (b) False
  3. 3.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
  4. 4.🪝 What does a single fixed pulley change? (a) the size of the load (b) the direction of pull (c) gravity (d) the colour of rope
  5. 5.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 3 m, how many metres of rope must you pull?
  6. 6.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
  7. 7.🪝 A bucket weighing 180 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  8. 8.🪝 A load of 280 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  9. 9.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
  10. 10.🪝 A bucket weighing 390 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  11. 11.🪝 A wheel and axle is a big wheel fixed to … (a) a smaller rod (axle) (b) a flat ramp (c) a loose rope (d) a sharp wedge
  12. 12.True or false: a fixed pulley needs effort = load. (a) True (b) False
  13. 13.🪝 A load of 320 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  14. 14.🪝 A pulley system lifts a 480 N load with an effort of 120 N. What is its mechanical advantage (MA)?
  15. 15.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 4 m, how many metres of rope must you pull?
  16. 16.🪝 A winch has a wheel of radius 28 cm and an axle of radius 4 cm. What effort on the wheel lifts a 1120 N bucket on the axle, in newtons? (ideal)
  17. 17.True or false: a movable pulley makes you pull 2× rope. (a) True (b) False
  18. 18.🪝 A pulley system lifts a 630 N load with an effort of 210 N. What is its mechanical advantage (MA)?
  19. 19.True or false: a fixed pulley stays in one place. (a) False (b) True
  20. 20.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
  21. 21.True or false: a movable pulley rises with the load. (a) True (b) False
  22. 22.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
  23. 23.True or false: a movable pulley is on a flagpole top. (a) False (b) True
  24. 24.🪝 A winch has a wheel of radius 4 cm and an axle of radius 1 cm. What effort on the wheel lifts a 320 N bucket on the axle, in newtons? (ideal)
  25. 25.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 4 m, how many metres of rope must you pull?
  26. 26.🪝 A well winch has a handle (wheel) of radius 6 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
  27. 27.🪝 A well winch has a handle (wheel) of radius 8 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
  28. 28.True or false: a movable pulley only changes direction. (a) False (b) True
  29. 29.🪝 A winch has a wheel of radius 2 cm and an axle of radius 1 cm. What effort on the wheel lifts a 100 N bucket on the axle, in newtons? (ideal)
  30. 30.True or false: a movable pulley stays in one place. (a) False (b) True
  31. 31.🪝 A bucket weighing 20 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  32. 32.🪝 A load of 420 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  33. 33.True or false: a movable pulley needs effort = load. (a) False (b) True
  34. 34.🪝 A well winch has a handle (wheel) of radius 2 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
  35. 35.🪝 A pulley system lifts a 140 N load with an effort of 70 N. What is its mechanical advantage (MA)?
  36. 36.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
  37. 37.True or false: a fixed pulley only changes direction. (a) False (b) True
  38. 38.🪝 A well winch has a handle (wheel) of radius 40 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
  39. 39.🪝 A bucket weighing 50 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  40. 40.🪝 A bucket weighing 170 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)

Answer key

  1. less effort needed
  2. False
  3. a fixed pulley
  4. the direction of pull
  5. 3
  6. a fixed pulley
  7. 180
  8. 70
  9. a movable pulley
  10. 390
  11. a smaller rod (axle)
  12. True
  13. 160
  14. 4
  15. 8
  16. 160
  17. True
  18. 3
  19. True
  20. a movable pulley
  21. True
  22. a fixed pulley
  23. False
  24. 80
  25. 12
  26. 2
  27. 2
  28. False
  29. 50
  30. False
  31. 20
  32. 210
  33. False
  34. 2
  35. 2
  36. a movable pulley
  37. True
  38. 8
  39. 50
  40. 170

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