← Pulleys and the wheel and axle lesson New set →

Pulleys and Wheel and Axle Worksheet

Engineering lesson 14: Pulleys and the wheel and axle · Set 380 · 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.

NameDateTime takenScore ___ / 40
  1. 1.True or false: a movable pulley stays in one place. (a) True (b) False
  2. 2.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
  3. 3.🪝 A load of 480 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  4. 4.🪝 A pulley system lifts a 920 N load with an effort of 230 N. What is its mechanical advantage (MA)?
  5. 5.🪝 A load of 540 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  6. 6.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
  7. 7.🪝 What does a single fixed pulley change? (a) the colour of rope (b) the size of the load (c) gravity (d) the direction of pull
  8. 8.🪝 A pulley system lifts a 450 N load with an effort of 150 N. What is its mechanical advantage (MA)?
  9. 9.True or false: a fixed pulley rises with the load. (a) True (b) False
  10. 10.🪝 More rope sections holding a load means … (a) more effort needed (b) less effort needed (c) no change (d) the load floats
  11. 11.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
  12. 12.🪝 A well winch has a handle (wheel) of radius 12 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
  13. 13.🪝 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)
  14. 14.🪝 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)
  15. 15.True or false: a movable pulley halves the effort. (a) False (b) True
  16. 16.🪝 A load of 720 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.True or false: a fixed pulley stays in one place. (a) False (b) True
  18. 18.🪝 A load of 60 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  19. 19.🪝 A bucket weighing 490 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.True or false: a movable pulley only changes direction. (a) True (b) False
  21. 21.🪝 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)
  22. 22.🪝 A wheel and axle is a big wheel fixed to … (a) a smaller rod (axle) (b) a sharp wedge (c) a loose rope (d) a flat ramp
  23. 23.🪝 A bucket weighing 20 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  24. 24.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
  25. 25.True or false: a movable pulley needs effort = load. (a) True (b) False
  26. 26.🪝 A winch has a wheel of radius 20 cm and an axle of radius 4 cm. What effort on the wheel lifts a 100 N bucket on the axle, in newtons? (ideal)
  27. 27.🪝 A load of 390 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  28. 28.🪝 A well winch has a handle (wheel) of radius 3 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
  29. 29.True or false: a movable pulley is on a flagpole top. (a) False (b) True
  30. 30.🪝 A bucket weighing 230 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 2 m, how many metres of rope must you pull?
  32. 32.🪝 A winch has a wheel of radius 9 cm and an axle of radius 3 cm. What effort on the wheel lifts a 330 N bucket on the axle, in newtons? (ideal)
  33. 33.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
  34. 34.True or false: a movable pulley rises with the load. (a) False (b) True
  35. 35.True or false: a fixed pulley is on a flagpole top. (a) False (b) True
  36. 36.True or false: a movable pulley hangs on the rope loop. (a) True (b) False
  37. 37.🪝 A bucket weighing 400 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.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
  39. 39.🪝 A winch has a wheel of radius 21 cm and an axle of radius 3 cm. What effort on the wheel lifts a 700 N bucket on the axle, in newtons? (ideal)
  40. 40.🪝 A winch has a wheel of radius 10 cm and an axle of radius 2 cm. What effort on the wheel lifts a 350 N bucket on the axle, in newtons? (ideal)

Answer key

  1. False
  2. a movable pulley
  3. 240
  4. 4
  5. 180
  6. a movable pulley
  7. the direction of pull
  8. 3
  9. False
  10. less effort needed
  11. 27
  12. 4
  13. 60
  14. 200
  15. True
  16. 180
  17. True
  18. 30
  19. 490
  20. False
  21. 70
  22. a smaller rod (axle)
  23. 20
  24. a movable pulley
  25. False
  26. 20
  27. 130
  28. 3
  29. False
  30. 230
  31. 8
  32. 110
  33. a fixed pulley
  34. True
  35. True
  36. True
  37. 400
  38. a movable pulley
  39. 100
  40. 70

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids