Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 663 · 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 slower”? (a) small drives big (b) big drives small
2. 2.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
3. 3.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
4. 4.⚙️ 5 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 5 turn? (a) anticlockwise (b) clockwise
5. 5.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
6. 6.True or false: “the output turns slower” happens when a big gear drives a small one. (a) True (b) False
7. 7.True or false: “the output is stronger” happens when a big gear drives a small one. (a) True (b) False
8. 8.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) True (b) False
9. 9.⚙️ A 12-tooth driver gear turns an 8-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
10. 10.⚙️ The gear fixed to the motor is called the … (a) idler gear (b) tyre (c) driver gear (d) driven gear
11. 11.⚙️ 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
12. 12.True or false: “the output is weaker” happens when a small gear drives a big one. (a) True (b) False
13. 13.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
14. 14.⚙️ 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
15. 15.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
16. 16.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) False (b) True
17. 17.⚙️ A 30-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
18. 18.⚙️ A 10-tooth driver gear turns an 8-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
19. 19.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) False (b) True
20. 20.True or false: “the output is weaker” happens when a big gear drives a small one. (a) True (b) False
21. 21.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
22. 22.⚙️ A 30-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
23. 23.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) False (b) True
24. 24.True or false: “the output turns slower” happens when a small gear drives a big one. (a) False (b) True
25. 25.⚙️ A big gear drives a small gear. The small gear turns … (a) not at all (b) at the same speed (c) faster but weaker (d) slower but stronger
26. 26.True or false: “the output turns faster” happens when a small gear drives a big one. (a) True (b) False
27. 27.⚙️ A small gear drives a big gear. The big gear turns … (a) at the same speed (b) faster and weaker (c) not at all (d) slower but stronger
28. 28.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
29. 29.⚙️ 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
30. 30.⚙️ 7 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 7 turn? (a) clockwise (b) anticlockwise
31. 31.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) True (b) False
32. 32.⚙️ 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
33. 33.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
34. 34.⚙️ What are the bumps round the edge of a gear called? (a) teeth (b) spokes (c) pins (d) tyres
35. 35.⚙️ 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
36. 36.True or false: “the output is stronger” happens when a small gear drives a big one. (a) True (b) False
37. 37.⚙️ 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
38. 38.⚙️ 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
39. 39.⚙️ 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
40. 40.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big

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