Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 680 · 40 questions

Robot tip (Trade speed for strength): Meshed gears turn opposite ways; in a row, odd-numbered gears turn like gear 1. Small drives big: slower, stronger. Big drives small: faster, weaker. The gear with fewer teeth turns faster. Open belt: same direction. Crossed belt: opposite direction.

1. 1.⚙️ Two gears are meshed together. How do they turn? (a) the same direction (b) they do not turn (c) in opposite directions (d) one up, one down
2. 2.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) False (b) True
3. 3.⚙️ What are the bumps round the edge of a gear called? (a) pins (b) spokes (c) teeth (d) tyres
4. 4.⚙️ A robot fan must spin very fast. The motor’s driver gear meshes with a small gear. What kind of driver gear works best? (a) a big driver gear (b) a small driver gear
5. 5.⚙️ Pulley A turns anticlockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) clockwise (b) anticlockwise
6. 6.⚙️ A small gear drives a big gear. The big gear turns … (a) not at all (b) at the same speed (c) slower but stronger (d) faster and weaker
7. 7.⚙️ A robot arm must lift a heavy load slowly. The motor’s driver gear meshes with a big gear. What kind of driver gear works best? (a) a small driver gear (b) a big driver gear
8. 8.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
9. 9.⚙️ A 20-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
10. 10.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
11. 11.True or false: “the output is weaker” happens when a big gear drives a small one. (a) True (b) False
12. 12.⚙️ A 16-tooth driver gear turns a 40-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
13. 13.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) False (b) True
14. 14.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
15. 15.True or false: “the output is stronger” happens when a small gear drives a big one. (a) False (b) True
16. 16.⚙️ The gear fixed to the motor is called the … (a) tyre (b) driver gear (c) driven gear (d) idler gear
17. 17.⚙️ Pulley A turns clockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) clockwise (b) anticlockwise
18. 18.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
19. 19.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
20. 20.⚙️ A 15-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
21. 21.True or false: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True
22. 22.True or false: “the output turns slower” happens when a small gear drives a big one. (a) False (b) True
23. 23.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) False (b) True
24. 24.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
25. 25.⚙️ 5 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 5 turn? (a) anticlockwise (b) clockwise
26. 26.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
27. 27.⚙️ A big gear drives a small gear. The small gear turns … (a) not at all (b) faster but weaker (c) slower but stronger (d) at the same speed
28. 28.⚙️ 5 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 5 turn? (a) anticlockwise (b) clockwise
29. 29.True or false: “the output is weaker” happens when a small gear drives a big one. (a) True (b) False
30. 30.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 2 turn? (a) clockwise (b) anticlockwise
31. 31.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) False (b) True
32. 32.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 6 turn? (a) clockwise (b) anticlockwise
33. 33.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
34. 34.⚙️ A 10-tooth driver gear turns a 40-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
35. 35.⚙️ A 12-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
36. 36.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
37. 37.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 4 turn? (a) anticlockwise (b) clockwise
38. 38.⚙️ A 24-tooth driver gear turns a 15-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
39. 39.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
40. 40.⚙️ A 30-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower

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