Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 976 · 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.⚙️ 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
2. 2.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
3. 3.⚙️ 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
4. 4.⚙️ 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
5. 5.⚙️ A 36-tooth driver gear turns a 16-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
6. 6.⚙️ 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
7. 7.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
8. 8.⚙️ 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
9. 9.⚙️ 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
10. 10.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
11. 11.⚙️ 7 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 7 turn? (a) anticlockwise (b) clockwise
12. 12.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
13. 13.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
14. 14.True or false: “the output turns faster” happens when a small gear drives a big one. (a) True (b) False
15. 15.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) True (b) False
16. 16.True or false: “the output turns slower” happens when a small gear drives a big one. (a) False (b) True
17. 17.⚙️ The gear fixed to the motor is called the … (a) idler gear (b) driver gear (c) tyre (d) driven gear
18. 18.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
19. 19.⚙️ What are the bumps round the edge of a gear called? (a) pins (b) tyres (c) spokes (d) teeth
20. 20.⚙️ 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
21. 21.True or false: “the output turns slower” happens when a big gear drives a small one. (a) True (b) False
22. 22.⚙️ 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
23. 23.⚙️ A 40-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
24. 24.⚙️ 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
25. 25.⚙️ Two gears are meshed together. How do they turn? (a) the same direction (b) they do not turn (c) one up, one down (d) in opposite directions
26. 26.True or false: “the output is stronger” happens when a big gear drives a small one. (a) True (b) False
27. 27.⚙️ A 12-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
28. 28.⚙️ 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
29. 29.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) False (b) True
30. 30.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) False (b) True
31. 31.True or false: “the output is weaker” happens when a small gear drives a big one. (a) True (b) False
32. 32.⚙️ A 40-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.⚙️ A 15-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.⚙️ 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
35. 35.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
36. 36.⚙️ An 8-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
37. 37.True or false: “the output turns faster” happens when a big gear drives a small one. (a) False (b) True
38. 38.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
39. 39.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
40. 40.True or false: “the output is stronger” happens when a small gear drives a big one. (a) False (b) True

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