Robotics Worksheet: Gears – Speed or Strength

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

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