Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 816 · 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.⚙️ 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
3. 3.⚙️ A 24-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
4. 4.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
5. 5.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) big drives small (b) small drives big
6. 6.⚙️ 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
7. 7.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) False (b) True
8. 8.⚙️ A 36-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
9. 9.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
10. 10.⚙️ The gear fixed to the motor is called the … (a) driver gear (b) idler gear (c) driven gear (d) tyre
11. 11.⚙️ 5 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 5 turn? (a) anticlockwise (b) clockwise
12. 12.⚙️ What are the bumps round the edge of a gear called? (a) tyres (b) teeth (c) spokes (d) pins
13. 13.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) False (b) True
14. 14.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) False (b) True
15. 15.⚙️ Two gears are meshed together. How do they turn? (a) they do not turn (b) in opposite directions (c) the same direction (d) one up, one down
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.⚙️ A 15-tooth driver gear turns a 16-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
18. 18.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
19. 19.⚙️ A big gear drives a small gear. The small gear turns … (a) at the same speed (b) not at all (c) faster but weaker (d) slower but stronger
20. 20.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
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 small gear drives a big one. (a) True (b) False
23. 23.⚙️ A small gear drives a big gear. The big gear turns … (a) faster and weaker (b) slower but stronger (c) not at all (d) at the same speed
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.⚙️ A 40-tooth driver gear turns a 20-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
26. 26.⚙️ 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
27. 27.⚙️ 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
28. 28.True or false: “the output is weaker” happens when a big gear drives a small one. (a) True (b) False
29. 29.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
30. 30.True or false: “the output turns slower” happens when a small gear drives a big one. (a) True (b) False
31. 31.⚙️ 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
32. 32.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
33. 33.⚙️ 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
34. 34.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
35. 35.⚙️ 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
36. 36.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
37. 37.True or false: “the output is weaker” happens when a small gear drives a big one. (a) True (b) False
38. 38.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) True (b) False
39. 39.True or false: “the output turns faster” happens when a big gear drives a small one. (a) True (b) False
40. 40.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small

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