Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 91 · 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: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True
2. 2.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
3. 3.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
4. 4.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) True (b) False
5. 5.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
6. 6.⚙️ 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
7. 7.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 3 turn? (a) clockwise (b) anticlockwise
8. 8.⚙️ The gear fixed to the motor is called the … (a) driver gear (b) tyre (c) driven gear (d) idler gear
9. 9.⚙️ 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
10. 10.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) False (b) True
11. 11.⚙️ 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
12. 12.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
13. 13.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
14. 14.⚙️ 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
15. 15.⚙️ Two gears are meshed together. How do they turn? (a) the same direction (b) they do not turn (c) in opposite directions (d) one up, one down
16. 16.True or false: “the output is stronger” happens when a small gear drives a big one. (a) True (b) False
17. 17.⚙️ A 15-tooth driver gear turns a 15-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
18. 18.⚙️ A 16-tooth driver gear turns a 24-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
19. 19.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
20. 20.⚙️ 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
21. 21.⚙️ What are the bumps round the edge of a gear called? (a) teeth (b) spokes (c) tyres (d) pins
22. 22.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) False (b) True
23. 23.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
24. 24.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) False (b) True
25. 25.⚙️ A 36-tooth driver gear turns a 15-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
26. 26.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 4 turn? (a) anticlockwise (b) clockwise
27. 27.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) False (b) True
28. 28.True or false: “the output is weaker” happens when a small gear drives a big one. (a) True (b) False
29. 29.⚙️ 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
30. 30.⚙️ A small gear drives a big gear. The big gear turns … (a) not at all (b) slower but stronger (c) faster and weaker (d) at the same speed
31. 31.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
32. 32.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
33. 33.⚙️ A 16-tooth driver gear turns a 12-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
34. 34.⚙️ 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
35. 35.⚙️ A big gear drives a small gear. The small gear turns … (a) slower but stronger (b) not at all (c) at the same speed (d) faster but weaker
36. 36.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
37. 37.True or false: “good for lifting loads” happens when a small gear drives a big 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.⚙️ 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 15-tooth driver gear turns an 8-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed

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