← 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 348 · 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.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
  2. 2.🪝 A winch has a wheel of radius 8 cm and an axle of radius 4 cm. What effort on the wheel lifts a 320 N bucket on the axle, in newtons? (ideal)
  3. 3.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
  4. 4.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 8 m, how many metres of rope must you pull?
  5. 5.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
  6. 6.🪝 A pulley system lifts a 420 N load with an effort of 140 N. What is its mechanical advantage (MA)?
  7. 7.🪝 A pulley system lifts a 1040 N load with an effort of 260 N. What is its mechanical advantage (MA)?
  8. 8.True or false: a movable pulley only changes direction. (a) False (b) True
  9. 9.🪝 A pulley system lifts an 80 N load with an effort of 20 N. What is its mechanical advantage (MA)?
  10. 10.True or false: a movable pulley halves the effort. (a) True (b) False
  11. 11.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 7 m, how many metres of rope must you pull?
  12. 12.🪝 A load of 520 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  13. 13.🪝 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)
  14. 14.🪝 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)
  15. 15.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the colour of rope (c) the size of the load (d) gravity
  16. 16.True or false: a movable pulley hangs on the rope loop. (a) True (b) False
  17. 17.True or false: a movable pulley needs effort = load. (a) True (b) False
  18. 18.🪝 A bucket weighing 340 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  19. 19.🪝 More rope sections holding a load means … (a) more effort needed (b) no change (c) the load floats (d) less effort needed
  20. 20.🪝 A pulley system lifts a 120 N load with an effort of 60 N. What is its mechanical advantage (MA)?
  21. 21.🪝 A wheel and axle is a big wheel fixed to … (a) a smaller rod (axle) (b) a flat ramp (c) a loose rope (d) a sharp wedge
  22. 22.🪝 A load of 880 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  23. 23.True or false: a fixed pulley only changes direction. (a) False (b) True
  24. 24.True or false: a fixed pulley hangs on the rope loop. (a) True (b) False
  25. 25.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 8 m, how many metres of rope must you pull?
  26. 26.🪝 A load of 240 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  27. 27.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
  28. 28.🪝 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)
  29. 29.True or false: a fixed pulley stays in one place. (a) False (b) True
  30. 30.🪝 A well winch has a handle (wheel) of radius 30 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
  31. 31.True or false: a fixed pulley needs effort = load. (a) True (b) False
  32. 32.🪝 A well winch has a handle (wheel) of radius 7 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
  33. 33.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
  34. 34.True or false: a movable pulley stays in one place. (a) True (b) False
  35. 35.True or false: a movable pulley makes you pull 2× rope. (a) False (b) True
  36. 36.🪝 A well winch has a handle (wheel) of radius 9 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
  37. 37.🪝 A pulley system lifts a 160 N load with an effort of 80 N. What is its mechanical advantage (MA)?
  38. 38.🪝 A winch has a wheel of radius 6 cm and an axle of radius 3 cm. What effort on the wheel lifts a 40 N bucket on the axle, in newtons? (ideal)
  39. 39.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 10 m, how many metres of rope must you pull?
  40. 40.🪝 A winch has a wheel of radius 3 cm and an axle of radius 1 cm. What effort on the wheel lifts a 60 N bucket on the axle, in newtons? (ideal)

Answer key

  1. a fixed pulley
  2. 160
  3. a fixed pulley
  4. 8
  5. a movable pulley
  6. 3
  7. 4
  8. False
  9. 4
  10. True
  11. 7
  12. 130
  13. 400
  14. 220
  15. the direction of pull
  16. True
  17. False
  18. 340
  19. less effort needed
  20. 2
  21. a smaller rod (axle)
  22. 220
  23. True
  24. False
  25. 24
  26. 60
  27. a fixed pulley
  28. 70
  29. True
  30. 6
  31. True
  32. 7
  33. a movable pulley
  34. False
  35. True
  36. 3
  37. 2
  38. 20
  39. 30
  40. 20

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