Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 630 · 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.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
2. 2.⚙️ A 24-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
3. 3.⚙️ 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
4. 4.⚙️ A big gear drives a small gear. The small gear turns … (a) faster but weaker (b) slower but stronger (c) not at all (d) at the same speed
5. 5.True or false: “the output turns slower” happens when a small gear drives a big one. (a) True (b) False
6. 6.⚙️ Pulley A turns clockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) anticlockwise (b) clockwise
7. 7.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
8. 8.True or false: “the output is weaker” happens when a big gear drives a small one. (a) True (b) False
9. 9.⚙️ A 40-tooth driver gear turns a 12-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
10. 10.⚙️ The gear fixed to the motor is called the … (a) idler gear (b) driven gear (c) driver gear (d) tyre
11. 11.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) True (b) False
12. 12.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
13. 13.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
14. 14.⚙️ Two gears are meshed together. How do they turn? (a) they do not turn (b) the same direction (c) one up, one down (d) in opposite directions
15. 15.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) True (b) False
16. 16.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) True (b) False
17. 17.⚙️ A small gear drives a big gear. The big gear turns … (a) not at all (b) at the same speed (c) faster and weaker (d) slower but stronger
18. 18.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
19. 19.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 3 turn? (a) anticlockwise (b) clockwise
20. 20.⚙️ 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
21. 21.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
22. 22.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
23. 23.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 6 turn? (a) anticlockwise (b) clockwise
24. 24.⚙️ What are the bumps round the edge of a gear called? (a) pins (b) tyres (c) teeth (d) spokes
25. 25.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) False (b) True
26. 26.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 4 turn? (a) anticlockwise (b) clockwise
27. 27.⚙️ 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
28. 28.True or false: “the output turns faster” happens when a big gear drives a small one. (a) True (b) False
29. 29.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
30. 30.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) True (b) False
31. 31.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
32. 32.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
33. 33.⚙️ A 15-tooth driver gear turns a 15-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
34. 34.True or false: “the output is weaker” happens when a small gear drives a big one. (a) True (b) False
35. 35.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
36. 36.True or false: “the output turns faster” happens when a small gear drives a big one. (a) True (b) False
37. 37.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 3 turn? (a) clockwise (b) anticlockwise
38. 38.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 4 turn? (a) clockwise (b) anticlockwise
39. 39.⚙️ A 15-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) faster (c) slower
40. 40.⚙️ An 8-tooth driver gear turns a 12-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster

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