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Pulleys and Wheel and Axle Worksheet

Engineering lesson 14: Pulleys and the wheel and axle · Set 567 · 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 lifts a 180 N load with an effort of 90 N. What is its mechanical advantage (MA)?
  2. 2.True or false: a fixed pulley makes you pull 2× rope. (a) False (b) True
  3. 3.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 10 m, how many metres of rope must you pull?
  4. 4.True or false: a fixed pulley rises with the load. (a) True (b) False
  5. 5.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
  6. 6.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
  7. 7.🪝 A load of 480 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  8. 8.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
  9. 9.🪝 A winch has a wheel of radius 4 cm and an axle of radius 1 cm. What effort on the wheel lifts a 640 N bucket on the axle, in newtons? (ideal)
  10. 10.True or false: a movable pulley makes you pull 2× rope. (a) True (b) False
  11. 11.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
  12. 12.🪝 A bucket weighing 90 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  13. 13.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
  14. 14.🪝 A pulley system lifts a 480 N load with an effort of 160 N. What is its mechanical advantage (MA)?
  15. 15.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the size of the load (c) gravity (d) the colour of rope
  16. 16.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
  17. 17.True or false: a fixed pulley only changes direction. (a) False (b) True
  18. 18.🪝 More rope sections holding a load means … (a) less effort needed (b) the load floats (c) more effort needed (d) no change
  19. 19.🪝 A bucket weighing 120 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  20. 20.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
  21. 21.🪝 A pulley system lifts a 680 N load with an effort of 170 N. What is its mechanical advantage (MA)?
  22. 22.🪝 A pulley system lifts a 570 N load with an effort of 190 N. What is its mechanical advantage (MA)?
  23. 23.🪝 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)
  24. 24.True or false: a movable pulley needs effort = load. (a) True (b) False
  25. 25.True or false: a fixed pulley is on a flagpole top. (a) True (b) False
  26. 26.🪝 A winch has a wheel of radius 24 cm and an axle of radius 3 cm. What effort on the wheel lifts an 880 N bucket on the axle, in newtons? (ideal)
  27. 27.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a movable pulley (b) a fixed pulley
  28. 28.🪝 A winch has a wheel of radius 24 cm and an axle of radius 3 cm. What effort on the wheel lifts a 1360 N bucket on the axle, in newtons? (ideal)
  29. 29.🪝 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)
  30. 30.True or false: a fixed pulley hangs on the rope loop. (a) True (b) False
  31. 31.🪝 A load of 160 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  32. 32.True or false: a fixed pulley needs effort = load. (a) False (b) True
  33. 33.True or false: a movable pulley stays in one place. (a) True (b) False
  34. 34.True or false: a fixed pulley stays in one place. (a) True (b) False
  35. 35.🪝 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)
  36. 36.🪝 A bucket weighing 250 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.🪝 A well winch has a handle (wheel) of radius 12 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
  38. 38.🪝 A pulley system lifts a 160 N load with an effort of 80 N. What is its mechanical advantage (MA)?
  39. 39.True or false: a movable pulley is on a flagpole top. (a) True (b) False
  40. 40.🪝 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)

Answer key

  1. 2
  2. False
  3. 10
  4. False
  5. a fixed pulley
  6. a movable pulley
  7. 160
  8. 2
  9. 160
  10. True
  11. a movable pulley
  12. 90
  13. a movable pulley
  14. 3
  15. the direction of pull
  16. a fixed pulley
  17. True
  18. less effort needed
  19. 120
  20. a fixed pulley
  21. 4
  22. 3
  23. a smaller rod (axle)
  24. False
  25. True
  26. 110
  27. a movable pulley
  28. 170
  29. 420
  30. False
  31. 40
  32. True
  33. False
  34. True
  35. 260
  36. 250
  37. 3
  38. 2
  39. False
  40. 470

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