Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 795 · 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.⚙️ A small gear drives a big gear. The big gear turns … (a) faster and weaker (b) not at all (c) slower but stronger (d) at the same speed
2. 2.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) False (b) True
3. 3.⚙️ What are the bumps round the edge of a gear called? (a) pins (b) teeth (c) spokes (d) tyres
4. 4.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
5. 5.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
6. 6.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
7. 7.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) True (b) False
8. 8.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
9. 9.⚙️ 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
10. 10.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) False (b) True
11. 11.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
12. 12.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
13. 13.True or false: “the output is weaker” happens when a big gear drives a small one. (a) True (b) False
14. 14.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) big drives small (b) small drives big
15. 15.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
16. 16.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
17. 17.⚙️ 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
18. 18.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) True (b) False
19. 19.True or false: “the output is weaker” happens when a small gear drives a big one. (a) True (b) False
20. 20.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
21. 21.⚙️ 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
22. 22.⚙️ 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
23. 23.True or false: “the output turns slower” happens when a big gear drives a small one. (a) True (b) False
24. 24.⚙️ The gear fixed to the motor is called the … (a) idler gear (b) driver gear (c) tyre (d) driven gear
25. 25.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) False (b) True
26. 26.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) True (b) False
27. 27.⚙️ 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
28. 28.⚙️ 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
29. 29.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
30. 30.⚙️ Two gears are meshed together. How do they turn? (a) one up, one down (b) in opposite directions (c) they do not turn (d) the same direction
31. 31.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) True (b) False
32. 32.⚙️ A big gear drives a small gear. The small gear turns … (a) slower but stronger (b) not at all (c) faster but weaker (d) at the same speed
33. 33.⚙️ 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
34. 34.⚙️ A 10-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
35. 35.True or false: “the output turns slower” happens when a small gear drives a big one. (a) True (b) False
36. 36.⚙️ A 30-tooth driver gear turns a 24-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
37. 37.⚙️ A 20-tooth driver gear turns an 8-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
38. 38.⚙️ A 10-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
39. 39.⚙️ A 30-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) faster (c) slower
40. 40.True or false: “the output turns faster” happens when a small gear drives a big one. (a) True (b) False

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