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Pulleys and Wheel and Axle Worksheet

Engineering lesson 14: Pulleys and the wheel and axle · Set 648 · 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.🪝 More rope sections holding a load means … (a) the load floats (b) less effort needed (c) no change (d) more effort needed
  3. 3.🪝 A bucket weighing 70 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 loose rope (b) a smaller rod (axle) (c) a flat ramp (d) a sharp wedge
  5. 5.True or false: a movable pulley stays in one place. (a) False (b) True
  6. 6.🪝 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)
  7. 7.True or false: a movable pulley needs effort = load. (a) True (b) False
  8. 8.🪝 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?
  9. 9.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
  10. 10.🪝 A winch has a wheel of radius 2 cm and an axle of radius 1 cm. What effort on the wheel lifts a 380 N bucket on the axle, in newtons? (ideal)
  11. 11.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 5 m, how many metres of rope must you pull?
  12. 12.🪝 A winch has a wheel of radius 35 cm and an axle of radius 5 cm. What effort on the wheel lifts a 1260 N bucket on the axle, in newtons? (ideal)
  13. 13.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
  14. 14.True or false: a movable pulley only changes direction. (a) False (b) True
  15. 15.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
  16. 16.True or false: a fixed pulley only changes direction. (a) True (b) False
  17. 17.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
  18. 18.🪝 A well winch has a handle (wheel) of radius 6 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
  19. 19.🪝 A pulley system lifts a 520 N load with an effort of 260 N. What is its mechanical advantage (MA)?
  20. 20.🪝 What does a single fixed pulley change? (a) the colour of rope (b) gravity (c) the size of the load (d) the direction of pull
  21. 21.🪝 A well winch has a handle (wheel) of radius 16 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
  22. 22.True or false: a fixed pulley hangs on the rope loop. (a) True (b) False
  23. 23.True or false: a movable pulley is on a flagpole top. (a) False (b) True
  24. 24.🪝 A load of 260 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  25. 25.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
  26. 26.🪝 A load of 80 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  27. 27.🪝 A winch has a wheel of radius 18 cm and an axle of radius 3 cm. What effort on the wheel lifts a 1140 N bucket on the axle, in newtons? (ideal)
  28. 28.🪝 A pulley system lifts a 1040 N load with an effort of 260 N. What is its mechanical advantage (MA)?
  29. 29.🪝 A bucket weighing 500 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  30. 30.True or false: a movable pulley makes you pull 2× rope. (a) False (b) True
  31. 31.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
  32. 32.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 1 m, how many metres of rope must you pull?
  33. 33.🪝 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)
  34. 34.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
  35. 35.🪝 A winch has a wheel of radius 20 cm and an axle of radius 5 cm. What effort on the wheel lifts a 600 N bucket on the axle, in newtons? (ideal)
  36. 36.🪝 A well winch has a handle (wheel) of radius 24 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
  37. 37.True or false: a movable pulley rises with the load. (a) True (b) False
  38. 38.🪝 A load of 960 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  39. 39.🪝 A pulley system lifts a 480 N load with an effort of 120 N. What is its mechanical advantage (MA)?
  40. 40.True or false: a fixed pulley stays in one place. (a) True (b) False

Answer key

  1. a movable pulley
  2. less effort needed
  3. 70
  4. a smaller rod (axle)
  5. False
  6. 160
  7. False
  8. 24
  9. a movable pulley
  10. 190
  11. 20
  12. 180
  13. a movable pulley
  14. False
  15. a fixed pulley
  16. True
  17. a fixed pulley
  18. 6
  19. 2
  20. the direction of pull
  21. 4
  22. False
  23. False
  24. 130
  25. a fixed pulley
  26. 40
  27. 190
  28. 4
  29. 500
  30. True
  31. True
  32. 1
  33. 460
  34. a fixed pulley
  35. 150
  36. 8
  37. True
  38. 240
  39. 4
  40. True

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