← 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 953 · 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 7 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
  2. 2.🪝 A well winch has a handle (wheel) of radius 20 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
  3. 3.🪝 A pulley system lifts an 840 N load with an effort of 280 N. What is its mechanical advantage (MA)?
  4. 4.🪝 What does a single fixed pulley change? (a) the colour of rope (b) gravity (c) the direction of pull (d) the size of the load
  5. 5.🪝 A pulley system lifts a 420 N load with an effort of 210 N. What is its mechanical advantage (MA)?
  6. 6.🪝 A pulley system lifts a 60 N load with an effort of 30 N. What is its mechanical advantage (MA)?
  7. 7.🪝 A well winch has a handle (wheel) of radius 25 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
  8. 8.🪝 A pulley system lifts a 120 N load with an effort of 60 N. What is its mechanical advantage (MA)?
  9. 9.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
  10. 10.🪝 A bucket weighing 480 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.🪝 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)
  12. 12.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 5 m, how many metres of rope must you pull?
  13. 13.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
  14. 14.🪝 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)
  15. 15.🪝 A bucket weighing 450 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 pulley system lifts a 900 N load with an effort of 300 N. What is its mechanical advantage (MA)?
  17. 17.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
  18. 18.True or false: a movable pulley needs effort = load. (a) True (b) False
  19. 19.🪝 A winch has a wheel of radius 9 cm and an axle of radius 3 cm. What effort on the wheel lifts a 510 N bucket on the axle, in newtons? (ideal)
  20. 20.True or false: a fixed pulley only changes direction. (a) False (b) True
  21. 21.🪝 A well winch has a handle (wheel) of radius 20 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
  22. 22.True or false: a movable pulley makes you pull 2× rope. (a) False (b) True
  23. 23.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 4 m, how many metres of rope must you pull?
  24. 24.True or false: a fixed pulley hangs on the rope loop. (a) False (b) True
  25. 25.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
  26. 26.True or false: a movable pulley only changes direction. (a) False (b) True
  27. 27.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 6 m, how many metres of rope must you pull?
  28. 28.True or false: a fixed pulley makes you pull 2× rope. (a) True (b) False
  29. 29.🪝 A pulley system lifts a 280 N load with an effort of 140 N. What is its mechanical advantage (MA)?
  30. 30.🪝 A pulley system lifts a 360 N load with an effort of 90 N. What is its mechanical advantage (MA)?
  31. 31.🪝 More rope sections holding a load means … (a) more effort needed (b) no change (c) the load floats (d) less effort needed
  32. 32.🪝 A load of 450 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  33. 33.🪝 A load of 540 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  34. 34.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
  35. 35.🪝 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)
  36. 36.True or false: a fixed pulley needs effort = load. (a) False (b) True
  37. 37.🪝 A well winch has a handle (wheel) of radius 10 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
  38. 38.🪝 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)
  39. 39.🪝 A well winch has a handle (wheel) of radius 32 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
  40. 40.True or false: a movable pulley halves the effort. (a) True (b) False

Answer key

  1. 7
  2. 5
  3. 3
  4. the direction of pull
  5. 2
  6. 2
  7. 5
  8. 2
  9. a movable pulley
  10. 480
  11. 180
  12. 15
  13. a movable pulley
  14. 50
  15. 450
  16. 3
  17. a fixed pulley
  18. False
  19. 170
  20. True
  21. 4
  22. True
  23. 16
  24. False
  25. a movable pulley
  26. False
  27. 6
  28. False
  29. 2
  30. 4
  31. less effort needed
  32. 150
  33. 270
  34. a fixed pulley
  35. 240
  36. True
  37. 2
  38. 40
  39. 8
  40. True

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