← 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 853 · 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.🪝 More rope sections holding a load means … (a) less effort needed (b) the load floats (c) no change (d) more effort needed
  2. 2.True or false: a fixed pulley rises with the load. (a) False (b) True
  3. 3.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
  4. 4.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
  5. 5.🪝 A bucket weighing 50 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 winch has a wheel of radius 16 cm and an axle of radius 4 cm. What effort on the wheel lifts a 440 N bucket on the axle, in newtons? (ideal)
  7. 7.True or false: a fixed pulley makes you pull 2× rope. (a) False (b) True
  8. 8.🪝 A well winch has a handle (wheel) of radius 4 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
  9. 9.🪝 A well winch has a handle (wheel) of radius 15 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
  10. 10.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 10 m, how many metres of rope must you pull?
  11. 11.🪝 A bucket weighing 430 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  12. 12.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
  13. 13.🪝 A winch has a wheel of radius 4 cm and an axle of radius 2 cm. What effort on the wheel lifts a 300 N bucket on the axle, in newtons? (ideal)
  14. 14.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
  15. 15.🪝 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
  16. 16.🪝 A winch has a wheel of radius 12 cm and an axle of radius 4 cm. What effort on the wheel lifts a 150 N bucket on the axle, in newtons? (ideal)
  17. 17.True or false: a movable pulley makes you pull 2× rope. (a) False (b) True
  18. 18.🪝 A pulley system lifts a 280 N load with an effort of 70 N. What is its mechanical advantage (MA)?
  19. 19.True or false: a movable pulley only changes direction. (a) False (b) True
  20. 20.🪝 A well winch has a handle (wheel) of radius 3 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
  21. 21.True or false: a fixed pulley only changes direction. (a) False (b) True
  22. 22.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 3 m, how many metres of rope must you pull?
  23. 23.True or false: a fixed pulley needs effort = load. (a) False (b) True
  24. 24.🪝 A pulley system lifts a 480 N load with an effort of 160 N. What is its mechanical advantage (MA)?
  25. 25.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
  26. 26.🪝 A wheel and axle is a big wheel fixed to … (a) a sharp wedge (b) a loose rope (c) a flat ramp (d) a smaller rod (axle)
  27. 27.🪝 A well winch has a handle (wheel) of radius 16 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
  28. 28.🪝 A well winch has a handle (wheel) of radius 24 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
  29. 29.True or false: a fixed pulley hangs on the rope loop. (a) False (b) True
  30. 30.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
  31. 31.🪝 A pulley system lifts a 920 N load with an effort of 230 N. What is its mechanical advantage (MA)?
  32. 32.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
  33. 33.🪝 A pulley system lifts a 560 N load with an effort of 140 N. What is its mechanical advantage (MA)?
  34. 34.🪝 A pulley system lifts a 480 N load with an effort of 240 N. What is its mechanical advantage (MA)?
  35. 35.True or false: a fixed pulley stays in one place. (a) False (b) True
  36. 36.🪝 Fixed or movable pulley: which one halves the effort? (a) a movable pulley (b) a fixed pulley
  37. 37.🪝 A winch has a wheel of radius 4 cm and an axle of radius 1 cm. What effort on the wheel lifts a 560 N bucket on the axle, in newtons? (ideal)
  38. 38.True or false: a fixed pulley is on a flagpole top. (a) False (b) True
  39. 39.🪝 A well winch has a handle (wheel) of radius 30 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
  40. 40.🪝 A bucket weighing 110 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. less effort needed
  2. False
  3. a movable pulley
  4. a movable pulley
  5. 50
  6. 110
  7. False
  8. 2
  9. 5
  10. 40
  11. 430
  12. a fixed pulley
  13. 150
  14. a fixed pulley
  15. the direction of pull
  16. 50
  17. True
  18. 4
  19. False
  20. 3
  21. True
  22. 9
  23. True
  24. 3
  25. a movable pulley
  26. a smaller rod (axle)
  27. 4
  28. 6
  29. False
  30. a fixed pulley
  31. 4
  32. a fixed pulley
  33. 4
  34. 2
  35. True
  36. a movable pulley
  37. 140
  38. True
  39. 6
  40. 110

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