Pulleys and Wheel and Axle Worksheet

Engineering lesson 14: Pulleys and the wheel and axle · Set 939 · 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 21 cm and an axle of radius 3 cm. What effort on the wheel lifts a 210 N bucket on the axle, in newtons? (ideal)
2. 2.🪝 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?
3. 3.🪝 A load of 180 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.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a movable pulley (b) a fixed pulley
5. 5.🪝 A pulley system lifts a 540 N load with an effort of 180 N. What is its mechanical advantage (MA)?
6. 6.🪝 A load of 280 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
7. 7.🪝 A wheel and axle is a big wheel fixed to … (a) a smaller rod (axle) (b) a loose rope (c) a flat ramp (d) a sharp wedge
8. 8.True or false: a movable pulley only changes direction. (a) True (b) False
9. 9.🪝 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)
10. 10.🪝 A bucket weighing 430 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 450 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 bucket weighing 420 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
13. 13.🪝 A pulley system lifts a 300 N load with an effort of 150 N. What is its mechanical advantage (MA)?
14. 14.🪝 More rope sections holding a load means … (a) no change (b) the load floats (c) more effort needed (d) less effort needed
15. 15.🪝 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)
16. 16.🪝 A pulley system lifts a 200 N load with an effort of 50 N. What is its mechanical advantage (MA)?
17. 17.🪝 A load of 420 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
18. 18.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 6 m, how many metres of rope must you pull?
19. 19.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
20. 20.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 10 m, how many metres of rope must you pull?
21. 21.🪝 A winch has a wheel of radius 28 cm and an axle of radius 4 cm. What effort on the wheel lifts a 1190 N bucket on the axle, in newtons? (ideal)
22. 22.🪝 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)
23. 23.True or false: a fixed pulley hangs on the rope loop. (a) True (b) False
24. 24.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
25. 25.True or false: a movable pulley halves the effort. (a) False (b) True
26. 26.🪝 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)
27. 27.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
28. 28.True or false: a movable pulley rises with the load. (a) False (b) True
29. 29.🪝 A load of 460 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
30. 30.True or false: a movable pulley needs effort = load. (a) True (b) False
31. 31.🪝 What does a single fixed pulley change? (a) gravity (b) the colour of rope (c) the direction of pull (d) the size of the load
32. 32.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
33. 33.🪝 A well winch has a handle (wheel) of radius 15 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
34. 34.🪝 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)
35. 35.🪝 A load of 60 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
36. 36.🪝 A load of 380 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
37. 37.🪝 A winch has a wheel of radius 21 cm and an axle of radius 3 cm. What effort on the wheel lifts a 770 N bucket on the axle, in newtons? (ideal)
38. 38.🪝 A winch has a wheel of radius 12 cm and an axle of radius 2 cm. What effort on the wheel lifts an 840 N bucket on the axle, in newtons? (ideal)
39. 39.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
40. 40.🪝 A pulley system lifts a 320 N load with an effort of 160 N. What is its mechanical advantage (MA)?

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