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Pulleys and Wheel and Axle Worksheet

Engineering lesson 14: Pulleys and the wheel and axle · Set 60 · 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 is on a flagpole top? (a) a fixed pulley (b) a movable pulley
  2. 2.True or false: a movable pulley halves the effort. (a) True (b) False
  3. 3.True or false: a movable pulley is on a flagpole top. (a) True (b) False
  4. 4.🪝 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)
  5. 5.🪝 A pulley system lifts a 640 N load with an effort of 160 N. What is its mechanical advantage (MA)?
  6. 6.🪝 A pulley system lifts a 480 N load with an effort of 160 N. What is its mechanical advantage (MA)?
  7. 7.🪝 A load of 400 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  8. 8.🪝 A wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a smaller rod (axle) (c) a sharp wedge (d) a loose rope
  9. 9.True or false: a movable pulley stays in one place. (a) True (b) False
  10. 10.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
  11. 11.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 6 m, how many metres of rope must you pull?
  12. 12.True or false: a movable pulley makes you pull 2× rope. (a) False (b) True
  13. 13.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
  14. 14.🪝 A bucket weighing 440 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  15. 15.🪝 What does a single fixed pulley change? (a) the colour of rope (b) gravity (c) the direction of pull (d) the size of the load
  16. 16.🪝 A load of 560 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  17. 17.🪝 A pulley system lifts a 120 N load with an effort of 60 N. What is its mechanical advantage (MA)?
  18. 18.True or false: a fixed pulley hangs on the rope loop. (a) False (b) True
  19. 19.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
  20. 20.🪝 A winch has a wheel of radius 30 cm and an axle of radius 5 cm. What effort on the wheel lifts an 840 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.🪝 A bucket weighing 290 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  23. 23.True or false: a movable pulley rises with the load. (a) True (b) False
  24. 24.🪝 A well winch has a handle (wheel) of radius 40 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
  25. 25.🪝 A load of 500 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  26. 26.🪝 More rope sections holding a load means … (a) less effort needed (b) the load floats (c) more effort needed (d) no change
  27. 27.🪝 A well winch has a handle (wheel) of radius 25 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
  28. 28.🪝 A pulley system lifts an 80 N load with an effort of 40 N. What is its mechanical advantage (MA)?
  29. 29.🪝 A load of 40 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  30. 30.🪝 A bucket weighing 480 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.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 6 m, how many metres of rope must you pull?
  32. 32.🪝 A load of 120 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.🪝 A well winch has a handle (wheel) of radius 16 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
  34. 34.🪝 A winch has a wheel of radius 32 cm and an axle of radius 4 cm. What effort on the wheel lifts a 320 N bucket on the axle, in newtons? (ideal)
  35. 35.🪝 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?
  36. 36.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
  37. 37.🪝 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?
  38. 38.🪝 A well winch has a handle (wheel) of radius 8 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
  39. 39.🪝 A well winch has a handle (wheel) of radius 15 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
  40. 40.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley

Answer key

  1. a fixed pulley
  2. True
  3. False
  4. 390
  5. 4
  6. 3
  7. 200
  8. a smaller rod (axle)
  9. False
  10. a fixed pulley
  11. 18
  12. True
  13. a fixed pulley
  14. 440
  15. the direction of pull
  16. 140
  17. 2
  18. False
  19. a movable pulley
  20. 140
  21. a fixed pulley
  22. 290
  23. True
  24. 8
  25. 250
  26. less effort needed
  27. 5
  28. 2
  29. 20
  30. 480
  31. 24
  32. 60
  33. 8
  34. 40
  35. 30
  36. True
  37. 8
  38. 8
  39. 5
  40. a movable pulley

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