Pulleys and Wheel and Axle Worksheet

Engineering lesson 14: Pulleys and the wheel and axle · Set 141 · 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 380 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.🪝 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)
3. 3.🪝 More rope sections holding a load means … (a) no change (b) less effort needed (c) more effort needed (d) the load floats
4. 4.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
5. 5.🪝 A well winch has a handle (wheel) of radius 6 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
6. 6.🪝 A wheel and axle is a big wheel fixed to … (a) a smaller rod (axle) (b) a flat ramp (c) a sharp wedge (d) a loose rope
7. 7.🪝 A pulley system lifts an 810 N load with an effort of 270 N. What is its mechanical advantage (MA)?
8. 8.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the colour of rope (c) the size of the load (d) gravity
9. 9.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
10. 10.🪝 A pulley system lifts a 600 N load with an effort of 300 N. What is its mechanical advantage (MA)?
11. 11.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
12. 12.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
13. 13.🪝 A winch has a wheel of radius 4 cm and an axle of radius 1 cm. What effort on the wheel lifts a 680 N bucket on the axle, in newtons? (ideal)
14. 14.🪝 A winch has a wheel of radius 12 cm and an axle of radius 2 cm. What effort on the wheel lifts a 1200 N bucket on the axle, in newtons? (ideal)
15. 15.🪝 A well winch has a handle (wheel) of radius 8 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
16. 16.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
17. 17.True or false: a movable pulley stays in one place. (a) False (b) True
18. 18.True or false: a fixed pulley stays in one place. (a) False (b) True
19. 19.🪝 A pulley system lifts a 510 N load with an effort of 170 N. What is its mechanical advantage (MA)?
20. 20.🪝 A bucket weighing 170 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
21. 21.🪝 A winch has a wheel of radius 32 cm and an axle of radius 4 cm. What effort on the wheel lifts a 320 N bucket on the axle, in newtons? (ideal)
22. 22.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
23. 23.True or false: a movable pulley only changes direction. (a) True (b) False
24. 24.True or false: a fixed pulley rises with the load. (a) True (b) False
25. 25.🪝 A pulley system lifts a 120 N load with an effort of 60 N. What is its mechanical advantage (MA)?
26. 26.🪝 A bucket weighing 410 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.🪝 A load of 840 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
28. 28.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
29. 29.🪝 A winch has a wheel of radius 24 cm and an axle of radius 4 cm. What effort on the wheel lifts a 660 N bucket on the axle, in newtons? (ideal)
30. 30.🪝 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)
31. 31.True or false: a fixed pulley only changes direction. (a) False (b) True
32. 32.🪝 A pulley system lifts a 200 N load with an effort of 100 N. What is its mechanical advantage (MA)?
33. 33.🪝 A bucket weighing 400 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
34. 34.🪝 A well winch has a handle (wheel) of radius 24 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
35. 35.🪝 A pulley system lifts a 260 N load with an effort of 130 N. What is its mechanical advantage (MA)?
36. 36.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
37. 37.🪝 A bucket weighing 80 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.True or false: a movable pulley needs effort = load. (a) False (b) True
39. 39.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
40. 40.🪝 A pulley system lifts a 660 N load with an effort of 220 N. What is its mechanical advantage (MA)?

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