Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 389 · 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: “good for lifting loads” happens when a big gear drives a small one. (a) True (b) False
2. 2.⚙️ A 16-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) faster (c) slower
3. 3.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
4. 4.⚙️ A 16-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
5. 5.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
6. 6.⚙️ The gear fixed to the motor is called the … (a) driven gear (b) driver gear (c) idler gear (d) tyre
7. 7.⚙️ 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
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.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) False (b) True
10. 10.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) True (b) False
11. 11.⚙️ 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
12. 12.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
13. 13.⚙️ A 12-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.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
15. 15.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) False (b) True
16. 16.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
17. 17.⚙️ A big gear drives a small gear. The small gear turns … (a) not at all (b) at the same speed (c) faster but weaker (d) slower but stronger
18. 18.⚙️ 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
19. 19.⚙️ 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
20. 20.True or false: “the output turns faster” happens when a small gear drives a big one. (a) True (b) False
21. 21.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
22. 22.⚙️ What are the bumps round the edge of a gear called? (a) teeth (b) spokes (c) tyres (d) pins
23. 23.⚙️ Two gears are meshed together. How do they turn? (a) one up, one down (b) the same direction (c) in opposite directions (d) they do not turn
24. 24.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) False (b) True
25. 25.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
26. 26.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
27. 27.True or false: “the output is stronger” happens when a small gear drives a big one. (a) False (b) True
28. 28.⚙️ 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
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.⚙️ An 8-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
31. 31.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
32. 32.⚙️ 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
33. 33.⚙️ 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
34. 34.⚙️ A 40-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
35. 35.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
36. 36.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
37. 37.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) False (b) True
38. 38.⚙️ A big gear drives a small gear. The small gear turns … (a) slower but stronger (b) faster but weaker (c) not at all (d) at the same speed
39. 39.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) True (b) False
40. 40.True or false: “the output turns faster” happens when a big gear drives a small one. (a) True (b) False

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