Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 452 · 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.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 4 turn? (a) clockwise (b) anticlockwise
2. 2.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) False (b) True
3. 3.⚙️ A small gear drives a big gear. The big gear turns … (a) slower but stronger (b) at the same speed (c) not at all (d) faster and weaker
4. 4.⚙️ A 12-tooth driver gear turns a 12-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
5. 5.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
6. 6.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
7. 7.⚙️ 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 small driver gear (b) a big driver gear
8. 8.⚙️ 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
9. 9.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) True (b) False
10. 10.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 3 turn? (a) clockwise (b) anticlockwise
11. 11.⚙️ A big gear drives a small gear. The small gear turns … (a) slower but stronger (b) not at all (c) at the same speed (d) faster but weaker
12. 12.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
13. 13.True or false: “the output is weaker” happens when a big gear drives a small one. (a) True (b) False
14. 14.⚙️ An 8-tooth driver gear turns a 15-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
15. 15.⚙️ The gear fixed to the motor is called the … (a) tyre (b) idler gear (c) driver gear (d) driven gear
16. 16.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) False (b) True
17. 17.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
18. 18.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
19. 19.⚙️ 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
20. 20.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 6 turn? (a) clockwise (b) anticlockwise
21. 21.⚙️ 7 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 7 turn? (a) clockwise (b) anticlockwise
22. 22.⚙️ What are the bumps round the edge of a gear called? (a) spokes (b) tyres (c) pins (d) teeth
23. 23.True or false: “the output is weaker” happens when a small gear drives a big one. (a) True (b) False
24. 24.True or false: “the output is stronger” happens when a small gear drives a big one. (a) True (b) False
25. 25.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) True (b) False
26. 26.⚙️ 7 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 7 turn? (a) clockwise (b) anticlockwise
27. 27.⚙️ 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
28. 28.⚙️ A 20-tooth driver gear turns a 24-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
29. 29.True or false: “the output turns faster” happens when a big gear drives a small one. (a) True (b) False
30. 30.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
31. 31.⚙️ 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
32. 32.True or false: “the output turns slower” happens when a small gear drives a big one. (a) True (b) False
33. 33.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
34. 34.⚙️ 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
35. 35.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) False (b) True
36. 36.⚙️ A 12-tooth driver gear turns a 40-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
37. 37.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 2 turn? (a) clockwise (b) anticlockwise
38. 38.⚙️ 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
39. 39.True or false: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True
40. 40.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small

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