Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 552 · 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.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
2. 2.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
3. 3.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
4. 4.⚙️ 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
5. 5.⚙️ A 12-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
6. 6.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) True (b) False
7. 7.⚙️ What are the bumps round the edge of a gear called? (a) spokes (b) pins (c) tyres (d) teeth
8. 8.⚙️ 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
9. 9.⚙️ 5 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 5 turn? (a) clockwise (b) anticlockwise
10. 10.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
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) anticlockwise (b) clockwise
12. 12.True or false: “the output turns faster” happens when a small gear drives a big one. (a) True (b) False
13. 13.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) True (b) False
14. 14.True or false: “the output is weaker” happens when a small gear drives a big one. (a) True (b) False
15. 15.⚙️ 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
16. 16.⚙️ A 20-tooth driver gear turns a 16-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
17. 17.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
18. 18.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
19. 19.⚙️ 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
20. 20.True or false: “the output is weaker” happens when a big gear drives a small one. (a) True (b) False
21. 21.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) False (b) True
22. 22.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
23. 23.True or false: “the output is stronger” happens when a small gear drives a big one. (a) True (b) False
24. 24.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) True (b) False
25. 25.⚙️ 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
26. 26.⚙️ 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
27. 27.⚙️ A 12-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) slower (c) faster
28. 28.⚙️ 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
29. 29.⚙️ 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
30. 30.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
31. 31.⚙️ A 40-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
32. 32.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
33. 33.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) True (b) False
34. 34.⚙️ The gear fixed to the motor is called the … (a) idler gear (b) driven gear (c) tyre (d) driver gear
35. 35.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
36. 36.⚙️ 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
37. 37.⚙️ A 40-tooth driver gear turns a 20-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
38. 38.⚙️ A 40-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
39. 39.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
40. 40.True or false: “the output turns slower” happens when a small gear drives a big one. (a) False (b) True

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