Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 2 · 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: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True
2. 2.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
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 small driver gear (b) a big driver gear
4. 4.⚙️ A big gear drives a small gear. The small gear turns … (a) at the same speed (b) faster but weaker (c) slower but stronger (d) not at all
5. 5.⚙️ A small gear drives a big gear. The big gear turns … (a) at the same speed (b) faster and weaker (c) slower but stronger (d) not at all
6. 6.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
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 a slow crane”? (a) big drives small (b) small drives big
9. 9.⚙️ The gear fixed to the motor is called the … (a) driver gear (b) tyre (c) driven gear (d) idler gear
10. 10.⚙️ 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
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 12-tooth driver gear turns a 12-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
13. 13.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
14. 14.⚙️ Two gears are meshed together. How do they turn? (a) one up, one down (b) in opposite directions (c) the same direction (d) they do not turn
15. 15.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) True (b) False
16. 16.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) True (b) False
17. 17.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
18. 18.⚙️ A 20-tooth driver gear turns a 24-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
19. 19.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) True (b) False
20. 20.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) False (b) True
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 lifting loads”? (a) small drives big (b) big drives small
23. 23.⚙️ An 8-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) slower (c) faster
24. 24.⚙️ 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) faster (c) slower
25. 25.⚙️ A 40-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
26. 26.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
27. 27.⚙️ A 30-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
28. 28.⚙️ 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
29. 29.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
30. 30.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
31. 31.⚙️ A 16-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
32. 32.⚙️ 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
33. 33.True or false: “the output is stronger” happens when a small gear drives a big one. (a) False (b) True
34. 34.True or false: “the output turns slower” happens when a small gear drives a big one. (a) True (b) False
35. 35.⚙️ A 36-tooth driver gear turns a 15-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (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.⚙️ What are the bumps round the edge of a gear called? (a) spokes (b) pins (c) tyres (d) teeth
38. 38.⚙️ 7 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 7 turn? (a) anticlockwise (b) clockwise
39. 39.⚙️ 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
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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