Robotics Worksheet: Gears – Speed or Strength

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

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