Robotics Worksheet: Gears – Speed or Strength

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

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