Robotics Worksheet: Gears – Speed or Strength

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

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