Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 373 · 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.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
2. 2.⚙️ The gear fixed to the motor is called the … (a) idler gear (b) tyre (c) driven gear (d) driver gear
3. 3.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
4. 4.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 3 turn? (a) clockwise (b) anticlockwise
5. 5.⚙️ A 16-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
6. 6.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
7. 7.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) False (b) True
8. 8.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
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.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) False (b) True
11. 11.⚙️ Two gears are meshed together. How do they turn? (a) the same direction (b) one up, one down (c) in opposite directions (d) they do not turn
12. 12.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) True (b) False
13. 13.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) False (b) True
14. 14.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
15. 15.⚙️ A 10-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
16. 16.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
17. 17.True or false: “the output turns slower” happens when a small gear drives a big one. (a) False (b) True
18. 18.True or false: “the output is stronger” happens when a small gear drives a big one. (a) False (b) True
19. 19.⚙️ What are the bumps round the edge of a gear called? (a) teeth (b) spokes (c) tyres (d) pins
20. 20.⚙️ 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
21. 21.⚙️ A 15-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
22. 22.⚙️ 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
23. 23.⚙️ A 10-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
24. 24.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
25. 25.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
26. 26.⚙️ A small gear drives a big gear. The big gear turns … (a) not at all (b) faster and weaker (c) at the same speed (d) slower but stronger
27. 27.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
28. 28.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) False (b) True
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.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
31. 31.⚙️ 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
32. 32.True or false: “the output is weaker” happens when a small gear drives a big one. (a) True (b) False
33. 33.⚙️ 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
34. 34.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) True (b) False
35. 35.⚙️ Pulley A turns anticlockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) clockwise (b) anticlockwise
36. 36.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
37. 37.True or false: “the output turns faster” happens when a big gear drives a small one. (a) False (b) True
38. 38.⚙️ A 40-tooth driver gear turns a 16-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
39. 39.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 6 turn? (a) anticlockwise (b) clockwise
40. 40.⚙️ A 12-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

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