← 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 480 · 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.🪝 A well winch has a handle (wheel) of radius 20 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
  2. 2.🪝 A well winch has a handle (wheel) of radius 3 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
  3. 3.🪝 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
  4. 4.🪝 A pulley system lifts a 630 N load with an effort of 210 N. What is its mechanical advantage (MA)?
  5. 5.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 5 m, how many metres of rope must you pull?
  6. 6.🪝 A pulley system lifts a 100 N load with an effort of 50 N. What is its mechanical advantage (MA)?
  7. 7.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
  8. 8.🪝 A pulley system lifts a 560 N load with an effort of 280 N. What is its mechanical advantage (MA)?
  9. 9.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a sharp wedge (c) a smaller rod (axle) (d) a flat ramp
  10. 10.🪝 A bucket weighing 270 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.True or false: a movable pulley only changes direction. (a) True (b) False
  12. 12.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
  13. 13.🪝 A winch has a wheel of radius 20 cm and an axle of radius 4 cm. What effort on the wheel lifts a 250 N bucket on the axle, in newtons? (ideal)
  14. 14.🪝 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)
  15. 15.🪝 A bucket weighing 60 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  16. 16.🪝 A winch has a wheel of radius 6 cm and an axle of radius 1 cm. What effort on the wheel lifts a 1140 N bucket on the axle, in newtons? (ideal)
  17. 17.🪝 A bucket weighing 220 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  18. 18.🪝 A load of 510 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  19. 19.True or false: a fixed pulley rises with the load. (a) True (b) False
  20. 20.🪝 More rope sections holding a load means … (a) more effort needed (b) no change (c) the load floats (d) less effort needed
  21. 21.🪝 A bucket weighing 240 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.True or false: a movable pulley halves the effort. (a) True (b) False
  23. 23.🪝 A winch has a wheel of radius 6 cm and an axle of radius 2 cm. What effort on the wheel lifts a 480 N bucket on the axle, in newtons? (ideal)
  24. 24.True or false: a movable pulley needs effort = load. (a) True (b) False
  25. 25.🪝 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)
  26. 26.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
  27. 27.🪝 A winch has a wheel of radius 25 cm and an axle of radius 5 cm. What effort on the wheel lifts a 250 N bucket on the axle, in newtons? (ideal)
  28. 28.🪝 A winch has a wheel of radius 5 cm and an axle of radius 1 cm. What effort on the wheel lifts a 300 N bucket on the axle, in newtons? (ideal)
  29. 29.True or false: a fixed pulley needs effort = load. (a) False (b) True
  30. 30.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 1 m, how many metres of rope must you pull?
  31. 31.True or false: a fixed pulley makes you pull 2× rope. (a) True (b) False
  32. 32.🪝 A winch has a wheel of radius 7 cm and an axle of radius 1 cm. What effort on the wheel lifts a 1190 N bucket on the axle, in newtons? (ideal)
  33. 33.🪝 A winch has a wheel of radius 16 cm and an axle of radius 4 cm. What effort on the wheel lifts a 240 N bucket on the axle, in newtons? (ideal)
  34. 34.True or false: a movable pulley stays in one place. (a) True (b) False
  35. 35.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
  36. 36.🪝 A pulley system lifts a 120 N load with an effort of 30 N. What is its mechanical advantage (MA)?
  37. 37.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 4 m, how many metres of rope must you pull?
  38. 38.True or false: a fixed pulley halves the effort. (a) False (b) True
  39. 39.🪝 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)
  40. 40.🪝 A well winch has a handle (wheel) of radius 24 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?

Answer key

  1. 5
  2. 3
  3. the direction of pull
  4. 3
  5. 20
  6. 2
  7. a fixed pulley
  8. 2
  9. a smaller rod (axle)
  10. 270
  11. False
  12. a fixed pulley
  13. 50
  14. 180
  15. 60
  16. 190
  17. 220
  18. 170
  19. False
  20. less effort needed
  21. 240
  22. True
  23. 160
  24. False
  25. 60
  26. a fixed pulley
  27. 50
  28. 60
  29. True
  30. 4
  31. False
  32. 170
  33. 60
  34. False
  35. a movable pulley
  36. 4
  37. 12
  38. False
  39. 390
  40. 6

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