Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 155 · 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.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
2. 2.⚙️ 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
3. 3.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) False (b) True
4. 4.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) False (b) True
5. 5.⚙️ 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
6. 6.True or false: “the output turns faster” happens when a small gear drives a big one. (a) True (b) False
7. 7.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
8. 8.⚙️ 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
9. 9.⚙️ 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
10. 10.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
11. 11.⚙️ A 12-tooth driver gear turns a 12-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
12. 12.⚙️ 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
13. 13.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
14. 14.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
15. 15.True or false: “the output turns faster” happens when a big gear drives a small one. (a) False (b) True
16. 16.⚙️ 5 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 5 turn? (a) clockwise (b) anticlockwise
17. 17.True or false: “the output is stronger” happens when a small gear drives a big one. (a) True (b) False
18. 18.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
19. 19.⚙️ 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
20. 20.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
21. 21.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
22. 22.⚙️ 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
23. 23.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
24. 24.⚙️ 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
25. 25.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 6 turn? (a) anticlockwise (b) clockwise
26. 26.⚙️ A 15-tooth driver gear turns a 40-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: “the output is weaker” happens when a small gear drives a big one. (a) False (b) True
28. 28.⚙️ What are the bumps round the edge of a gear called? (a) tyres (b) spokes (c) pins (d) teeth
29. 29.⚙️ A 10-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) faster (c) slower
30. 30.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
31. 31.⚙️ A 40-tooth driver gear turns a 16-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
32. 32.True or false: “the output turns slower” happens when a small gear drives a big one. (a) False (b) True
33. 33.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) True (b) False
34. 34.⚙️ A 30-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
35. 35.⚙️ A 20-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
36. 36.⚙️ 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
37. 37.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) False (b) True
38. 38.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
39. 39.True or false: “the output is weaker” happens when a big gear drives a small one. (a) False (b) True
40. 40.⚙️ The gear fixed to the motor is called the … (a) driven gear (b) tyre (c) idler gear (d) driver gear

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