Pulleys and Wheel and Axle Worksheet

Engineering lesson 14: Pulleys and the wheel and axle · Set 724 · 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 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)
2. 2.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
3. 3.True or false: a movable pulley only changes direction. (a) False (b) True
4. 4.🪝 A wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a sharp wedge (c) a loose rope (d) a smaller rod (axle)
5. 5.🪝 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)
6. 6.🪝 A bucket weighing 120 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 winch has a wheel of radius 10 cm and an axle of radius 5 cm. What effort on the wheel lifts a 200 N bucket on the axle, in newtons? (ideal)
8. 8.🪝 A pulley system lifts a 360 N load with an effort of 120 N. What is its mechanical advantage (MA)?
9. 9.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
10. 10.🪝 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)
11. 11.True or false: a movable pulley makes you pull 2× rope. (a) True (b) False
12. 12.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
13. 13.🪝 A winch has a wheel of radius 6 cm and an axle of radius 1 cm. What effort on the wheel lifts a 120 N bucket on the axle, in newtons? (ideal)
14. 14.🪝 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)
15. 15.🪝 More rope sections holding a load means … (a) the load floats (b) less effort needed (c) no change (d) more effort needed
16. 16.🪝 A winch has a wheel of radius 14 cm and an axle of radius 2 cm. What effort on the wheel lifts a 350 N bucket on the axle, in newtons? (ideal)
17. 17.🪝 A winch has a wheel of radius 6 cm and an axle of radius 3 cm. What effort on the wheel lifts a 280 N bucket on the axle, in newtons? (ideal)
18. 18.🪝 A bucket weighing 30 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
19. 19.🪝 A winch has a wheel of radius 3 cm and an axle of radius 1 cm. What effort on the wheel lifts a 60 N bucket on the axle, in newtons? (ideal)
20. 20.🪝 A pulley system lifts a 1200 N load with an effort of 300 N. What is its mechanical advantage (MA)?
21. 21.🪝 A pulley system lifts a 420 N load with an effort of 210 N. What is its mechanical advantage (MA)?
22. 22.🪝 What does a single fixed pulley change? (a) the colour of rope (b) the size of the load (c) the direction of pull (d) gravity
23. 23.🪝 A winch has a wheel of radius 6 cm and an axle of radius 1 cm. What effort on the wheel lifts a 1080 N bucket on the axle, in newtons? (ideal)
24. 24.🪝 A pulley system lifts a 560 N load with an effort of 280 N. What is its mechanical advantage (MA)?
25. 25.🪝 A load of 870 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
26. 26.🪝 A winch has a wheel of radius 14 cm and an axle of radius 2 cm. What effort on the wheel lifts a 140 N bucket on the axle, in newtons? (ideal)
27. 27.🪝 A pulley system lifts a 240 N load with an effort of 60 N. What is its mechanical advantage (MA)?
28. 28.🪝 A load of 100 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
29. 29.🪝 A load of 200 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.🪝 A load of 40 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
31. 31.🪝 A pulley system lifts a 240 N load with an effort of 80 N. What is its mechanical advantage (MA)?
32. 32.🪝 A well winch has a handle (wheel) of radius 3 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
33. 33.🪝 A winch has a wheel of radius 3 cm and an axle of radius 1 cm. What effort on the wheel lifts a 150 N bucket on the axle, in newtons? (ideal)
34. 34.🪝 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)
35. 35.True or false: a fixed pulley only changes direction. (a) False (b) True
36. 36.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
37. 37.🪝 A load of 180 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
38. 38.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
39. 39.🪝 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?
40. 40.🪝 A pulley system lifts a 390 N load with an effort of 130 N. What is its mechanical advantage (MA)?

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