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Pulleys and Wheel and Axle Worksheet

Engineering lesson 14: Pulleys and the wheel and axle · Set 253 · 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.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 8 m, how many metres of rope must you pull?
  2. 2.True or false: a movable pulley stays in one place. (a) True (b) False
  3. 3.True or false: a fixed pulley makes you pull 2× rope. (a) True (b) False
  4. 4.🪝 A bucket weighing 230 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  5. 5.True or false: a movable pulley rises with the load. (a) True (b) False
  6. 6.🪝 A bucket weighing 420 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  7. 7.True or false: a fixed pulley only changes direction. (a) False (b) True
  8. 8.🪝 A wheel and axle is a big wheel fixed to … (a) a smaller rod (axle) (b) a loose rope (c) a sharp wedge (d) a flat ramp
  9. 9.True or false: a fixed pulley rises with the load. (a) False (b) True
  10. 10.🪝 A winch has a wheel of radius 3 cm and an axle of radius 1 cm. What effort on the wheel lifts a 330 N bucket on the axle, in newtons? (ideal)
  11. 11.🪝 A bucket weighing 460 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  12. 12.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
  13. 13.🪝 A well winch has a handle (wheel) of radius 12 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
  14. 14.🪝 What does a single fixed pulley change? (a) the direction of pull (b) gravity (c) the colour of rope (d) the size of the load
  15. 15.🪝 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)
  16. 16.🪝 A winch has a wheel of radius 6 cm and an axle of radius 1 cm. What effort on the wheel lifts a 420 N bucket on the axle, in newtons? (ideal)
  17. 17.🪝 A winch has a wheel of radius 9 cm and an axle of radius 3 cm. What effort on the wheel lifts a 360 N bucket on the axle, in newtons? (ideal)
  18. 18.🪝 A pulley system lifts a 500 N load with an effort of 250 N. What is its mechanical advantage (MA)?
  19. 19.🪝 A load of 800 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  20. 20.🪝 A winch has a wheel of radius 20 cm and an axle of radius 4 cm. What effort on the wheel lifts a 200 N bucket on the axle, in newtons? (ideal)
  21. 21.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
  22. 22.True or false: a movable pulley only changes direction. (a) False (b) True
  23. 23.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
  24. 24.🪝 A bucket weighing 130 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  25. 25.🪝 A pulley system lifts a 360 N load with an effort of 180 N. What is its mechanical advantage (MA)?
  26. 26.🪝 A load of 880 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  27. 27.🪝 A pulley system lifts a 1000 N load with an effort of 250 N. What is its mechanical advantage (MA)?
  28. 28.True or false: a movable pulley is on a flagpole top. (a) False (b) True
  29. 29.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
  30. 30.🪝 A bucket weighing 40 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  31. 31.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
  32. 32.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 10 m, how many metres of rope must you pull?
  33. 33.🪝 More rope sections holding a load means … (a) the load floats (b) less effort needed (c) no change (d) more effort needed
  34. 34.🪝 A pulley system lifts a 680 N load with an effort of 170 N. What is its mechanical advantage (MA)?
  35. 35.🪝 A load of 900 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  36. 36.🪝 A bucket weighing 220 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  37. 37.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
  38. 38.True or false: a movable pulley halves the effort. (a) False (b) True
  39. 39.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
  40. 40.🪝 A well winch has a handle (wheel) of radius 9 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?

Answer key

  1. 24
  2. False
  3. False
  4. 230
  5. True
  6. 420
  7. True
  8. a smaller rod (axle)
  9. False
  10. 110
  11. 460
  12. a fixed pulley
  13. 6
  14. the direction of pull
  15. 70
  16. 70
  17. 120
  18. 2
  19. 200
  20. 40
  21. a fixed pulley
  22. False
  23. a movable pulley
  24. 130
  25. 2
  26. 220
  27. 4
  28. False
  29. a fixed pulley
  30. 40
  31. a fixed pulley
  32. 30
  33. less effort needed
  34. 4
  35. 300
  36. 220
  37. a movable pulley
  38. True
  39. 8
  40. 3

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