Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 314 · 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.⚙️ 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
2. 2.True or false: “the output is stronger” happens when a small gear drives a big one. (a) True (b) False
3. 3.⚙️ What are the bumps round the edge of a gear called? (a) pins (b) teeth (c) tyres (d) spokes
4. 4.⚙️ 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
5. 5.⚙️ 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
6. 6.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) False (b) True
7. 7.⚙️ The gear fixed to the motor is called the … (a) tyre (b) driven gear (c) idler gear (d) driver gear
8. 8.⚙️ 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
9. 9.⚙️ A 30-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) slower (c) faster
10. 10.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
11. 11.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) True (b) False
12. 12.⚙️ 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
13. 13.⚙️ 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
14. 14.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
15. 15.True or false: “the output turns slower” happens when a small gear drives a big 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 turns faster” happens when a big gear drives a small one. (a) True (b) False
18. 18.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
19. 19.⚙️ 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
20. 20.⚙️ A big gear drives a small gear. The small gear turns … (a) at the same speed (b) not at all (c) faster but weaker (d) slower but stronger
21. 21.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
22. 22.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) big drives small (b) small drives big
23. 23.⚙️ A 36-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
24. 24.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
25. 25.⚙️ A 20-tooth driver gear turns a 15-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
26. 26.⚙️ 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
27. 27.True or false: “the output turns faster” happens when a small gear drives a big one. (a) True (b) False
28. 28.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) False (b) True
29. 29.⚙️ 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
30. 30.⚙️ 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
31. 31.⚙️ 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
32. 32.⚙️ A 16-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
33. 33.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
34. 34.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) False (b) True
35. 35.⚙️ 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
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.⚙️ An 8-tooth driver gear turns an 8-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
38. 38.True or false: “the output is stronger” happens when a big gear drives a small one. (a) True (b) False
39. 39.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 6 turn? (a) clockwise (b) anticlockwise
40. 40.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small

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