Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 422 · 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.True or false: “the output turns faster” happens when a big gear drives a small one. (a) False (b) True
2. 2.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) True (b) False
3. 3.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
4. 4.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) True (b) False
5. 5.⚙️ A small gear drives a big gear. The big gear turns … (a) faster and weaker (b) not at all (c) slower but stronger (d) at the same speed
6. 6.⚙️ 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
7. 7.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) False (b) True
8. 8.⚙️ 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
9. 9.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
10. 10.⚙️ 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
11. 11.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
12. 12.⚙️ A 16-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
13. 13.⚙️ A big gear drives a small gear. The small gear turns … (a) not at all (b) faster but weaker (c) at the same speed (d) slower but stronger
14. 14.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) True (b) False
15. 15.⚙️ The gear fixed to the motor is called the … (a) idler gear (b) driven gear (c) tyre (d) driver gear
16. 16.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
17. 17.⚙️ A 15-tooth driver gear turns a 12-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
18. 18.True or false: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True
19. 19.⚙️ 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
20. 20.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
21. 21.⚙️ 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
22. 22.⚙️ 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
23. 23.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
24. 24.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) True (b) False
25. 25.⚙️ 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
26. 26.⚙️ 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
27. 27.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) True (b) False
28. 28.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
29. 29.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
30. 30.⚙️ A 24-tooth driver gear turns a 40-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
31. 31.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) True (b) False
32. 32.⚙️ A 36-tooth driver gear turns a 12-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (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) anticlockwise (b) clockwise
34. 34.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
35. 35.⚙️ 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
36. 36.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
37. 37.⚙️ A 10-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
38. 38.⚙️ 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
39. 39.⚙️ A 20-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
40. 40.⚙️ A 12-tooth driver gear turns a 24-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed

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