Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 585 · 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.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
2. 2.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
3. 3.⚙️ 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
4. 4.⚙️ Two gears are meshed together. How do they turn? (a) the same direction (b) in opposite directions (c) one up, one down (d) they do not turn
5. 5.True or false: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True
6. 6.⚙️ What are the bumps round the edge of a gear called? (a) pins (b) tyres (c) teeth (d) spokes
7. 7.⚙️ 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
8. 8.True or false: “the output is weaker” happens when a big gear drives a small one. (a) False (b) True
9. 9.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) True (b) False
10. 10.⚙️ A big gear drives a small gear. The small gear turns … (a) at the same speed (b) faster but weaker (c) not at all (d) slower but stronger
11. 11.⚙️ 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
12. 12.⚙️ 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
13. 13.⚙️ A 15-tooth driver gear turns a 40-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
14. 14.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
15. 15.True or false: “good for a slow crane” 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 big gear drives a small one. (a) False (b) True
17. 17.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
18. 18.⚙️ An 8-tooth driver gear turns an 8-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
19. 19.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) False (b) True
20. 20.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
21. 21.⚙️ 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
22. 22.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) False (b) True
23. 23.⚙️ A small gear drives a big gear. The big gear turns … (a) at the same speed (b) faster and weaker (c) not at all (d) slower but stronger
24. 24.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
25. 25.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
26. 26.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 3 turn? (a) anticlockwise (b) clockwise
27. 27.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 6 turn? (a) clockwise (b) anticlockwise
28. 28.⚙️ 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
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.⚙️ An 8-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
31. 31.⚙️ 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
32. 32.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
33. 33.⚙️ 7 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 7 turn? (a) clockwise (b) anticlockwise
34. 34.⚙️ 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
35. 35.⚙️ The gear fixed to the motor is called the … (a) tyre (b) driven gear (c) driver gear (d) idler gear
36. 36.⚙️ A 20-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
37. 37.⚙️ A 12-tooth driver gear turns a 24-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
38. 38.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
39. 39.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 4 turn? (a) clockwise (b) anticlockwise
40. 40.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) False (b) True

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