Pulleys and Wheel and Axle Worksheet

Engineering lesson 14: Pulleys and the wheel and axle · Set 574 · 40 questions

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.

1. 1.🪝 A winch has a wheel of radius 10 cm and an axle of radius 2 cm. What effort on the wheel lifts a 700 N bucket on the axle, in newtons? (ideal)
2. 2.🪝 More rope sections holding a load means … (a) no change (b) more effort needed (c) the load floats (d) less effort needed
3. 3.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
4. 4.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
5. 5.🪝 A winch has a wheel of radius 8 cm and an axle of radius 1 cm. What effort on the wheel lifts a 240 N bucket on the axle, in newtons? (ideal)
6. 6.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
7. 7.🪝 A wheel and axle is a big wheel fixed to … (a) a sharp wedge (b) a flat ramp (c) a smaller rod (axle) (d) a loose rope
8. 8.🪝 What does a single fixed pulley change? (a) the size of the load (b) the colour of rope (c) gravity (d) the direction of pull
9. 9.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
10. 10.🪝 A well winch has a handle (wheel) of radius 32 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
11. 11.True or false: a fixed pulley is on a flagpole top. (a) False (b) True
12. 12.🪝 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?
13. 13.True or false: a fixed pulley makes you pull 2× rope. (a) False (b) True
14. 14.🪝 A bucket weighing 440 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 470 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.True or false: a movable pulley makes you pull 2× rope. (a) True (b) False
17. 17.True or false: a fixed pulley hangs on the rope loop. (a) False (b) True
18. 18.🪝 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)
19. 19.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
20. 20.🪝 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?
21. 21.🪝 A well winch has a handle (wheel) of radius 4 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
22. 22.True or false: a fixed pulley halves the effort. (a) False (b) True
23. 23.🪝 A well winch has a handle (wheel) of radius 18 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
24. 24.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 7 m, how many metres of rope must you pull?
25. 25.🪝 A well winch has a handle (wheel) of radius 8 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
26. 26.🪝 A pulley system lifts a 510 N load with an effort of 170 N. What is its mechanical advantage (MA)?
27. 27.🪝 A load of 160 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
28. 28.🪝 A pulley system lifts a 540 N load with an effort of 270 N. What is its mechanical advantage (MA)?
29. 29.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 1 m, how many metres of rope must you pull?
30. 30.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
31. 31.🪝 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)
32. 32.🪝 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)
33. 33.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
34. 34.🪝 A bucket weighing 460 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
35. 35.🪝 A pulley system lifts a 520 N load with an effort of 260 N. What is its mechanical advantage (MA)?
36. 36.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a movable pulley (b) a fixed pulley
37. 37.🪝 A load of 80 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
38. 38.🪝 A winch has a wheel of radius 21 cm and an axle of radius 3 cm. What effort on the wheel lifts a 1260 N bucket on the axle, in newtons? (ideal)
39. 39.🪝 A winch has a wheel of radius 16 cm and an axle of radius 4 cm. What effort on the wheel lifts a 400 N bucket on the axle, in newtons? (ideal)
40. 40.True or false: a movable pulley only changes direction. (a) True (b) False

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