Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 933 · 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 a racing toy” happens when a small gear drives a big one. (a) True (b) False
2. 2.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 2 turn? (a) clockwise (b) anticlockwise
3. 3.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
4. 4.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
5. 5.⚙️ 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
6. 6.⚙️ A 10-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
7. 7.⚙️ 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
8. 8.⚙️ A small gear drives a big gear. The big gear turns … (a) at the same speed (b) slower but stronger (c) faster and weaker (d) not at all
9. 9.⚙️ 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
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.⚙️ What are the bumps round the edge of a gear called? (a) spokes (b) teeth (c) tyres (d) pins
12. 12.⚙️ 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
13. 13.⚙️ Two gears are meshed together. How do they turn? (a) they do not turn (b) the same direction (c) one up, one down (d) in opposite directions
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.True or false: “the output is weaker” happens when a small gear drives a big one. (a) False (b) True
16. 16.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) False (b) True
17. 17.⚙️ The gear fixed to the motor is called the … (a) tyre (b) idler gear (c) driver gear (d) driven gear
18. 18.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) True (b) False
19. 19.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
20. 20.True or false: “the output is weaker” happens when a big gear drives a small one. (a) False (b) True
21. 21.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) big drives small (b) small drives big
22. 22.⚙️ 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
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.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
25. 25.⚙️ 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
26. 26.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) False (b) True
27. 27.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
28. 28.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
29. 29.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
30. 30.⚙️ 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
31. 31.True or false: “the output turns faster” happens when a small gear drives a big one. (a) True (b) False
32. 32.True or false: “the output is stronger” happens when a small gear drives a big one. (a) False (b) True
33. 33.⚙️ A 36-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
34. 34.⚙️ A 16-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
35. 35.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) False (b) True
36. 36.⚙️ 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
37. 37.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) True (b) False
38. 38.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
39. 39.⚙️ The gear fixed to the motor is called the … (a) driven gear (b) idler gear (c) driver gear (d) tyre
40. 40.⚙️ A 24-tooth driver gear turns a 20-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower

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