Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 309 · 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.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) True (b) False
2. 2.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
3. 3.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
4. 4.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
5. 5.⚙️ A big gear drives a small gear. The small gear turns … (a) not at all (b) at the same speed (c) faster but weaker (d) slower but stronger
6. 6.⚙️ A small gear drives a big gear. The big gear turns … (a) faster and weaker (b) not at all (c) at the same speed (d) slower but stronger
7. 7.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
8. 8.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
9. 9.True or false: “the output is weaker” happens when a big gear drives a small one. (a) True (b) False
10. 10.⚙️ A 16-tooth driver gear turns a 24-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
11. 11.⚙️ 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
12. 12.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) False (b) True
13. 13.⚙️ 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
14. 14.True or false: “the output turns slower” happens when a big gear drives a small one. (a) True (b) False
15. 15.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
16. 16.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
17. 17.⚙️ What are the bumps round the edge of a gear called? (a) pins (b) teeth (c) spokes (d) tyres
18. 18.⚙️ Two gears are meshed together. How do they turn? (a) in opposite directions (b) the same direction (c) they do not turn (d) one up, one down
19. 19.⚙️ 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 big driver gear (b) a small driver gear
20. 20.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
21. 21.⚙️ 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
22. 22.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) False (b) True
23. 23.⚙️ A 40-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
24. 24.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
25. 25.True or false: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True
26. 26.⚙️ The gear fixed to the motor is called the … (a) driven gear (b) tyre (c) driver gear (d) idler gear
27. 27.⚙️ An 8-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
28. 28.True or false: “the output is stronger” happens when a big gear drives a small one. (a) True (b) False
29. 29.⚙️ 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
30. 30.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) True (b) False
31. 31.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 2 turn? (a) anticlockwise (b) clockwise
32. 32.⚙️ A 15-tooth driver gear turns a 20-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
33. 33.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
34. 34.⚙️ 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
35. 35.⚙️ A 36-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) faster (c) slower
36. 36.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) True (b) False
37. 37.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) False (b) True
38. 38.⚙️ 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
39. 39.⚙️ What are the bumps round the edge of a gear called? (a) pins (b) spokes (c) teeth (d) tyres
40. 40.⚙️ A 40-tooth driver gear turns a 24-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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