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Pulleys and Wheel and Axle Worksheet

Engineering lesson 14: Pulleys and the wheel and axle · Set 901 · 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.True or false: a movable pulley needs effort = load. (a) True (b) False
  2. 2.🪝 A pulley system lifts a 1040 N load with an effort of 260 N. What is its mechanical advantage (MA)?
  3. 3.True or false: a fixed pulley makes you pull 2× rope. (a) True (b) False
  4. 4.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
  5. 5.🪝 A bucket weighing 140 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  6. 6.🪝 A wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a sharp wedge (c) a loose rope (d) a smaller rod (axle)
  7. 7.True or false: a movable pulley halves the effort. (a) False (b) True
  8. 8.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
  9. 9.🪝 A pulley system lifts a 1200 N load with an effort of 300 N. What is its mechanical advantage (MA)?
  10. 10.🪝 A bucket weighing 470 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  11. 11.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable 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 an 80 N load with an effort of 20 N. What is its mechanical advantage (MA)?
  14. 14.True or false: a movable pulley is on a flagpole top. (a) True (b) False
  15. 15.🪝 A well winch has a handle (wheel) of radius 21 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
  16. 16.True or false: a fixed pulley rises with the load. (a) True (b) False
  17. 17.🪝 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)
  18. 18.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
  19. 19.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
  20. 20.🪝 A bucket weighing 100 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  21. 21.🪝 A winch has a wheel of radius 21 cm and an axle of radius 3 cm. What effort on the wheel lifts a 980 N bucket on the axle, in newtons? (ideal)
  22. 22.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
  23. 23.🪝 A load of 100 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  24. 24.🪝 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)
  25. 25.True or false: a movable pulley rises with the load. (a) False (b) True
  26. 26.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a movable pulley (b) a fixed pulley
  27. 27.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
  28. 28.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
  29. 29.🪝 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?
  30. 30.🪝 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)
  31. 31.🪝 A well winch has a handle (wheel) of radius 40 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
  32. 32.True or false: a fixed pulley only changes direction. (a) True (b) False
  33. 33.🪝 A pulley system lifts a 510 N load with an effort of 170 N. What is its mechanical advantage (MA)?
  34. 34.🪝 A pulley system lifts a 160 N load with an effort of 80 N. What is its mechanical advantage (MA)?
  35. 35.🪝 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)
  36. 36.🪝 A load of 1040 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  37. 37.🪝 A bucket weighing 150 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.🪝 A pulley system lifts a 640 N load with an effort of 160 N. What is its mechanical advantage (MA)?
  39. 39.🪝 What does a single fixed pulley change? (a) the size of the load (b) the colour of rope (c) the direction of pull (d) gravity
  40. 40.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley

Answer key

  1. False
  2. 4
  3. False
  4. a movable pulley
  5. 140
  6. a smaller rod (axle)
  7. True
  8. True
  9. 4
  10. 470
  11. a fixed pulley
  12. 6
  13. 4
  14. False
  15. 7
  16. False
  17. 140
  18. a fixed pulley
  19. a fixed pulley
  20. 100
  21. 140
  22. a movable pulley
  23. 50
  24. 180
  25. True
  26. a movable pulley
  27. 9
  28. a movable pulley
  29. 3
  30. 460
  31. 8
  32. True
  33. 3
  34. 2
  35. 390
  36. 260
  37. 150
  38. 4
  39. the direction of pull
  40. a fixed pulley

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