Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 214 · 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: “good for lifting loads” happens when a small gear drives a big one. (a) False (b) True
2. 2.⚙️ Two gears are meshed together. How do they turn? (a) the same direction (b) one up, one down (c) they do not turn (d) in opposite directions
3. 3.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) True (b) False
4. 4.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) big drives small (b) small drives big
5. 5.True or false: “the output is weaker” happens when a big gear drives a small one. (a) False (b) True
6. 6.⚙️ A 16-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) slower (c) faster
7. 7.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) False (b) True
8. 8.True or false: “the output turns faster” happens when a big gear drives a small 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.⚙️ 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
11. 11.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
12. 12.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
13. 13.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
14. 14.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 4 turn? (a) anticlockwise (b) clockwise
15. 15.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) False (b) True
16. 16.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
17. 17.⚙️ 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
18. 18.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) False (b) True
19. 19.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
20. 20.True or false: “the output is weaker” happens when a small gear drives a big one. (a) False (b) True
21. 21.⚙️ The gear fixed to the motor is called the … (a) idler gear (b) driven gear (c) driver gear (d) tyre
22. 22.⚙️ 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
23. 23.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 2 turn? (a) clockwise (b) anticlockwise
24. 24.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
25. 25.⚙️ 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
26. 26.⚙️ A 30-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
27. 27.⚙️ 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
28. 28.⚙️ A 30-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
29. 29.⚙️ 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
30. 30.True or false: “the output is stronger” happens when a small gear drives a big one. (a) False (b) True
31. 31.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
32. 32.⚙️ What are the bumps round the edge of a gear called? (a) pins (b) tyres (c) spokes (d) teeth
33. 33.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
34. 34.True or false: “the output is stronger” happens when a big gear drives a small one. (a) True (b) False
35. 35.⚙️ 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
36. 36.⚙️ 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
37. 37.⚙️ 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
38. 38.⚙️ A 20-tooth driver gear turns a 40-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
39. 39.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
40. 40.⚙️ 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

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