Pulleys and Wheel and Axle Worksheet

Engineering lesson 14: Pulleys and the wheel and axle · Set 224 · 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.True or false: a fixed pulley hangs on the rope loop. (a) False (b) True
2. 2.🪝 A load of 320 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
3. 3.🪝 A load of 90 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
4. 4.True or false: a fixed pulley rises with the load. (a) True (b) False
5. 5.🪝 A well winch has a handle (wheel) of radius 9 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
6. 6.🪝 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)
7. 7.🪝 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?
8. 8.🪝 A bucket weighing 210 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
9. 9.True or false: a fixed pulley needs effort = load. (a) True (b) False
10. 10.🪝 A well winch has a handle (wheel) of radius 6 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
11. 11.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 8 m, how many metres of rope must you pull?
12. 12.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
13. 13.🪝 More rope sections holding a load means … (a) more effort needed (b) the load floats (c) no change (d) less effort needed
14. 14.🪝 A pulley system lifts a 480 N load with an effort of 120 N. What is its mechanical advantage (MA)?
15. 15.True or false: a movable pulley is on a flagpole top. (a) True (b) False
16. 16.🪝 A well winch has a handle (wheel) of radius 18 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
17. 17.🪝 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
18. 18.🪝 A pulley system lifts a 210 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.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
21. 21.True or false: a movable pulley needs effort = load. (a) True (b) False
22. 22.🪝 A winch has a wheel of radius 6 cm and an axle of radius 3 cm. What effort on the wheel lifts a 320 N bucket on the axle, in newtons? (ideal)
23. 23.🪝 A winch has a wheel of radius 12 cm and an axle of radius 2 cm. What effort on the wheel lifts a 540 N bucket on the axle, in newtons? (ideal)
24. 24.🪝 A pulley system lifts a 120 N load with an effort of 30 N. What is its mechanical advantage (MA)?
25. 25.🪝 A pulley system lifts a 280 N load with an effort of 70 N. What is its mechanical advantage (MA)?
26. 26.🪝 A winch has a wheel of radius 20 cm and an axle of radius 4 cm. What effort on the wheel lifts a 350 N bucket on the axle, in newtons? (ideal)
27. 27.True or false: a movable pulley rises with the load. (a) True (b) False
28. 28.🪝 A well winch has a handle (wheel) of radius 6 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
29. 29.🪝 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
30. 30.True or false: a movable pulley halves the effort. (a) True (b) False
31. 31.🪝 A load of 260 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
32. 32.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
33. 33.🪝 Fixed or movable pulley: which one halves the effort? (a) a movable pulley (b) a fixed pulley
34. 34.🪝 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)
35. 35.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a movable pulley (b) a fixed pulley
36. 36.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
37. 37.🪝 A bucket weighing 70 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
38. 38.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 5 m, how many metres of rope must you pull?
39. 39.🪝 A winch has a wheel of radius 21 cm and an axle of radius 3 cm. What effort on the wheel lifts a 630 N bucket on the axle, in newtons? (ideal)
40. 40.True or false: a fixed pulley stays in one place. (a) True (b) False

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