Robotics Worksheet: Gears – Speed or Strength

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

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