Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 439 · 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.⚙️ 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
2. 2.⚙️ A 20-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) slower (c) faster
3. 3.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) True (b) False
4. 4.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
5. 5.⚙️ Which gear set-up gives this: “the output is stronger”? (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 big driver gear (b) a small driver gear
7. 7.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
8. 8.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
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.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
11. 11.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
12. 12.⚙️ 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
13. 13.True or false: “the output is weaker” happens when a big gear drives a small one. (a) False (b) True
14. 14.True or false: “the output is weaker” happens when a small gear drives a big one. (a) False (b) True
15. 15.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
16. 16.⚙️ 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
17. 17.⚙️ What are the bumps round the edge of a gear called? (a) tyres (b) teeth (c) spokes (d) pins
18. 18.⚙️ A small gear drives a big gear. The big gear turns … (a) faster and weaker (b) at the same speed (c) not at all (d) slower but stronger
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.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) False (b) True
21. 21.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) True (b) False
22. 22.⚙️ Two gears are meshed together. How do they turn? (a) they do not turn (b) the same direction (c) one up, one down (d) in opposite directions
23. 23.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) True (b) False
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.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
26. 26.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
27. 27.⚙️ 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
28. 28.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
29. 29.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) False (b) True
30. 30.⚙️ The gear fixed to the motor is called the … (a) driven gear (b) tyre (c) driver gear (d) idler gear
31. 31.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
32. 32.⚙️ A 15-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
33. 33.⚙️ 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
34. 34.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
35. 35.⚙️ 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
36. 36.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) False (b) True
37. 37.⚙️ An 8-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
38. 38.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) True (b) False
39. 39.⚙️ A 30-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
40. 40.True or false: “the output turns slower” happens when a small gear drives a big one. (a) False (b) True

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