Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 327 · 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) True (b) False
2. 2.⚙️ 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
3. 3.⚙️ A 10-tooth driver gear turns a 40-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
4. 4.⚙️ 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
5. 5.⚙️ 7 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 7 turn? (a) anticlockwise (b) clockwise
6. 6.⚙️ 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
7. 7.⚙️ What are the bumps round the edge of a gear called? (a) spokes (b) pins (c) tyres (d) teeth
8. 8.⚙️ Two gears are meshed together. How do they turn? (a) the same direction (b) one up, one down (c) in opposite directions (d) they do not turn
9. 9.⚙️ 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
10. 10.⚙️ The gear fixed to the motor is called the … (a) idler gear (b) driver gear (c) tyre (d) driven gear
11. 11.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
12. 12.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
13. 13.⚙️ A 15-tooth driver gear turns a 12-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
14. 14.⚙️ 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
15. 15.True or false: “the output is weaker” happens when a small gear drives a big one. (a) True (b) False
16. 16.⚙️ 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
17. 17.True or false: “the output is stronger” happens when a small gear drives a big one. (a) True (b) False
18. 18.⚙️ 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
19. 19.⚙️ 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 big driver gear (b) a small driver gear
20. 20.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
21. 21.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) False (b) True
22. 22.⚙️ 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
23. 23.⚙️ A 16-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
24. 24.True or false: “the output turns slower” happens when a small gear drives a big one. (a) False (b) True
25. 25.⚙️ 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
26. 26.⚙️ 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
27. 27.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) True (b) False
28. 28.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) True (b) False
29. 29.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) False (b) True
30. 30.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
31. 31.⚙️ 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
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: “the output is stronger” happens when a big gear drives a small one. (a) True (b) False
34. 34.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
35. 35.⚙️ 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
36. 36.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
37. 37.⚙️ 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
38. 38.⚙️ A big gear drives a small gear. The small gear turns … (a) slower but stronger (b) faster but weaker (c) at the same speed (d) not at all
39. 39.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) True (b) False
40. 40.⚙️ 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

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