Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 209 · 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.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
2. 2.⚙️ 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
3. 3.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
4. 4.⚙️ 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
5. 5.⚙️ What are the bumps round the edge of a gear called? (a) spokes (b) teeth (c) tyres (d) pins
6. 6.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
7. 7.⚙️ Two gears are meshed together. How do they turn? (a) one up, one down (b) they do not turn (c) the same direction (d) in opposite directions
8. 8.True or false: “the output is stronger” happens when a small gear drives a big one. (a) False (b) True
9. 9.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
10. 10.⚙️ 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
11. 11.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) False (b) True
12. 12.⚙️ 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
13. 13.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
14. 14.True or false: “the output turns faster” happens when a big gear drives a small one. (a) False (b) True
15. 15.⚙️ The gear fixed to the motor is called the … (a) idler gear (b) tyre (c) driver gear (d) driven gear
16. 16.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) False (b) True
17. 17.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
18. 18.⚙️ A big gear drives a small gear. The small gear turns … (a) faster but weaker (b) slower but stronger (c) at the same speed (d) not at all
19. 19.True or false: “the output is weaker” happens when a big gear drives a small one. (a) True (b) False
20. 20.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) True (b) False
21. 21.⚙️ A small gear drives a big gear. The big gear turns … (a) not at all (b) faster and weaker (c) slower but stronger (d) at the same speed
22. 22.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
23. 23.⚙️ 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
24. 24.⚙️ 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
25. 25.⚙️ 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
26. 26.⚙️ 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
27. 27.⚙️ Which gear set-up gives this: “good for a slow crane”? (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) anticlockwise (b) clockwise
29. 29.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
30. 30.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) True (b) False
31. 31.True or false: “the output is stronger” happens when a big gear drives a small one. (a) True (b) False
32. 32.True or false: “the output is weaker” happens when a small gear drives a big one. (a) False (b) True
33. 33.⚙️ A 40-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
34. 34.⚙️ A 30-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
35. 35.⚙️ A 20-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) slower (c) faster
36. 36.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) False (b) True
37. 37.⚙️ An 8-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
38. 38.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) True (b) False
39. 39.⚙️ A 16-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
40. 40.⚙️ 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

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