Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 99 · 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 big gear drives a small one. (a) False (b) True
2. 2.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
3. 3.⚙️ What are the bumps round the edge of a gear called? (a) pins (b) teeth (c) spokes (d) tyres
4. 4.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
5. 5.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
6. 6.⚙️ 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
7. 7.⚙️ A 12-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
8. 8.⚙️ The gear fixed to the motor is called the … (a) idler gear (b) driver gear (c) tyre (d) driven gear
9. 9.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) False (b) True
10. 10.⚙️ A 20-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
11. 11.⚙️ Two gears are meshed together. How do they turn? (a) the same direction (b) they do not turn (c) one up, one down (d) in opposite directions
12. 12.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) False (b) True
13. 13.⚙️ 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
14. 14.⚙️ A 40-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
15. 15.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 6 turn? (a) anticlockwise (b) clockwise
16. 16.True or false: “the output turns slower” happens when a small gear drives a big one. (a) True (b) False
17. 17.⚙️ 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
18. 18.⚙️ 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
19. 19.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
20. 20.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 3 turn? (a) anticlockwise (b) clockwise
21. 21.⚙️ A small gear drives a big gear. The big gear turns … (a) at the same speed (b) slower but stronger (c) faster and weaker (d) not at all
22. 22.True or false: “the output is weaker” happens when a small gear drives a big one. (a) True (b) False
23. 23.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
24. 24.⚙️ 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
25. 25.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
26. 26.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
27. 27.⚙️ 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
28. 28.True or false: “the output is weaker” happens when a big gear drives a small one. (a) False (b) True
29. 29.⚙️ A big gear drives a small gear. The small gear turns … (a) slower but stronger (b) at the same speed (c) not at all (d) faster but weaker
30. 30.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
31. 31.⚙️ 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
32. 32.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
33. 33.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) True (b) False
34. 34.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) False (b) True
35. 35.⚙️ A 30-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
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.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 3 turn? (a) anticlockwise (b) clockwise
38. 38.True or false: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True
39. 39.True or false: “the output is stronger” happens when a big gear drives a small one. (a) True (b) False
40. 40.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small

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