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Pulleys and Wheel and Axle Worksheet

Engineering lesson 14: Pulleys and the wheel and axle · Set 938 · 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 winch has a wheel of radius 7 cm and an axle of radius 1 cm. What effort on the wheel lifts a 630 N bucket on the axle, in newtons? (ideal)
  2. 2.True or false: a fixed pulley needs effort = load. (a) True (b) False
  3. 3.🪝 Fixed or movable pulley: which one halves the effort? (a) a movable pulley (b) a fixed pulley
  4. 4.🪝 A load of 460 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  5. 5.🪝 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
  6. 6.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
  7. 7.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
  8. 8.🪝 A pulley system lifts a 220 N load with an effort of 110 N. What is its mechanical advantage (MA)?
  9. 9.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
  10. 10.🪝 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)
  11. 11.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
  12. 12.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 3 m, how many metres of rope must you pull?
  13. 13.🪝 A pulley system lifts a 480 N load with an effort of 120 N. What is its mechanical advantage (MA)?
  14. 14.🪝 A load of 360 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  15. 15.True or false: a movable pulley only changes direction. (a) False (b) True
  16. 16.🪝 A well winch has a handle (wheel) of radius 4 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
  17. 17.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
  18. 18.🪝 A wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a loose rope (c) a sharp wedge (d) a smaller rod (axle)
  19. 19.🪝 A well winch has a handle (wheel) of radius 8 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
  20. 20.🪝 A load of 280 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  21. 21.🪝 More rope sections holding a load means … (a) less effort needed (b) no change (c) the load floats (d) more effort needed
  22. 22.🪝 A pulley system lifts an 800 N load with an effort of 200 N. What is its mechanical advantage (MA)?
  23. 23.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
  24. 24.🪝 A well winch has a handle (wheel) of radius 24 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
  25. 25.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
  26. 26.True or false: a movable pulley rises with the load. (a) True (b) False
  27. 27.🪝 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)
  28. 28.True or false: a movable pulley stays in one place. (a) False (b) True
  29. 29.🪝 A load of 580 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 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 lifts a 120 N load with an effort of 40 N. What is its mechanical advantage (MA)?
  32. 32.True or false: a fixed pulley hangs on the rope loop. (a) False (b) True
  33. 33.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
  34. 34.🪝 A well winch has a handle (wheel) of radius 16 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
  35. 35.🪝 A winch has a wheel of radius 4 cm and an axle of radius 2 cm. What effort on the wheel lifts a 400 N bucket on the axle, in newtons? (ideal)
  36. 36.🪝 A load of 440 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  37. 37.🪝 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)
  38. 38.True or false: a fixed pulley rises with the load. (a) True (b) False
  39. 39.🪝 A bucket weighing 260 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.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley

Answer key

  1. 90
  2. True
  3. a movable pulley
  4. 230
  5. the direction of pull
  6. a fixed pulley
  7. a fixed pulley
  8. 2
  9. 18
  10. 240
  11. a fixed pulley
  12. 6
  13. 4
  14. 180
  15. False
  16. 4
  17. a movable pulley
  18. a smaller rod (axle)
  19. 2
  20. 140
  21. less effort needed
  22. 4
  23. a movable pulley
  24. 6
  25. True
  26. True
  27. 180
  28. False
  29. 290
  30. 70
  31. 3
  32. False
  33. a fixed pulley
  34. 8
  35. 200
  36. 220
  37. 40
  38. False
  39. 260
  40. a movable pulley

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