Robotics Worksheet: Gears – Speed or Strength

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

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