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Pulleys and Wheel and Axle Worksheet

Engineering lesson 14: Pulleys and the wheel and axle · Set 69 · 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.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
  2. 2.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
  3. 3.🪝 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)
  4. 4.🪝 A wheel and axle is a big wheel fixed to … (a) a sharp wedge (b) a flat ramp (c) a loose rope (d) a smaller rod (axle)
  5. 5.🪝 What does a single fixed pulley change? (a) the colour of rope (b) the size of the load (c) gravity (d) the direction of pull
  6. 6.True or false: a fixed pulley halves the effort. (a) False (b) True
  7. 7.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
  8. 8.🪝 A bucket weighing 370 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  9. 9.🪝 A winch has a wheel of radius 6 cm and an axle of radius 1 cm. What effort on the wheel lifts a 480 N bucket on the axle, in newtons? (ideal)
  10. 10.🪝 A winch has a wheel of radius 24 cm and an axle of radius 3 cm. What effort on the wheel lifts a 1520 N bucket on the axle, in newtons? (ideal)
  11. 11.🪝 More rope sections holding a load means … (a) no change (b) more effort needed (c) the load floats (d) less effort needed
  12. 12.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
  13. 13.🪝 A winch has a wheel of radius 10 cm and an axle of radius 2 cm. What effort on the wheel lifts an 800 N bucket on the axle, in newtons? (ideal)
  14. 14.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
  15. 15.🪝 A bucket weighing 340 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  16. 16.🪝 A well winch has a handle (wheel) of radius 5 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
  17. 17.True or false: a fixed pulley makes you pull 2× rope. (a) True (b) False
  18. 18.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
  19. 19.🪝 A well winch has a handle (wheel) of radius 8 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
  20. 20.True or false: a fixed pulley only changes direction. (a) False (b) True
  21. 21.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a movable pulley (b) a fixed pulley
  22. 22.True or false: a movable pulley makes you pull 2× rope. (a) False (b) True
  23. 23.True or false: a movable pulley stays in one place. (a) False (b) True
  24. 24.🪝 A pulley system lifts a 520 N load with an effort of 260 N. What is its mechanical advantage (MA)?
  25. 25.True or false: a movable pulley needs effort = load. (a) False (b) True
  26. 26.🪝 A well winch has a handle (wheel) of radius 28 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
  27. 27.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 1 m, how many metres of rope must you pull?
  28. 28.🪝 A bucket weighing 90 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  29. 29.🪝 A pulley system lifts a 280 N load with an effort of 70 N. What is its mechanical advantage (MA)?
  30. 30.🪝 A load of 140 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  31. 31.🪝 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?
  32. 32.True or false: a fixed pulley needs effort = load. (a) False (b) True
  33. 33.🪝 A well winch has a handle (wheel) of radius 30 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
  34. 34.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
  35. 35.True or false: a movable pulley is on a flagpole top. (a) False (b) True
  36. 36.🪝 A winch has a wheel of radius 4 cm and an axle of radius 1 cm. What effort on the wheel lifts a 480 N bucket on the axle, in newtons? (ideal)
  37. 37.True or false: a movable pulley only changes direction. (a) True (b) False
  38. 38.🪝 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)
  39. 39.True or false: a fixed pulley rises with the load. (a) False (b) True
  40. 40.True or false: a fixed pulley stays in one place. (a) False (b) True

Answer key

  1. a movable pulley
  2. True
  3. 180
  4. a smaller rod (axle)
  5. the direction of pull
  6. False
  7. a movable pulley
  8. 370
  9. 80
  10. 190
  11. less effort needed
  12. 4
  13. 160
  14. a movable pulley
  15. 340
  16. 5
  17. False
  18. a fixed pulley
  19. 4
  20. True
  21. a movable pulley
  22. True
  23. False
  24. 2
  25. False
  26. 7
  27. 2
  28. 90
  29. 4
  30. 70
  31. 3
  32. True
  33. 6
  34. a fixed pulley
  35. False
  36. 120
  37. False
  38. 50
  39. False
  40. True

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