Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 193 · 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 is weaker” happens when a big gear drives a small one. (a) False (b) True
2. 2.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) big drives small (b) small drives big
3. 3.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) False (b) True
4. 4.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
5. 5.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
6. 6.⚙️ What are the bumps round the edge of a gear called? (a) teeth (b) pins (c) spokes (d) tyres
7. 7.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
8. 8.⚙️ 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
9. 9.⚙️ 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
10. 10.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 2 turn? (a) anticlockwise (b) clockwise
11. 11.⚙️ 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
12. 12.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
13. 13.⚙️ A big gear drives a small gear. The small gear turns … (a) at the same speed (b) faster but weaker (c) slower but stronger (d) not at all
14. 14.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) True (b) False
15. 15.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
16. 16.⚙️ 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
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: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
19. 19.⚙️ The gear fixed to the motor is called the … (a) driven gear (b) idler gear (c) tyre (d) driver gear
20. 20.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 6 turn? (a) clockwise (b) anticlockwise
21. 21.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
22. 22.⚙️ Two gears are meshed together. How do they turn? (a) the same direction (b) in opposite directions (c) they do not turn (d) one up, one down
23. 23.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) False (b) True
24. 24.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) True (b) False
25. 25.⚙️ A 16-tooth driver gear turns a 20-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
26. 26.True or false: “the output turns slower” happens when a small gear drives a big one. (a) False (b) True
27. 27.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
28. 28.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) False (b) True
29. 29.⚙️ A 30-tooth driver gear turns a 12-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
30. 30.True or false: “the output turns faster” happens when a small gear drives a big one. (a) True (b) False
31. 31.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
32. 32.⚙️ An 8-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
33. 33.⚙️ A small gear drives a big gear. The big gear turns … (a) faster and weaker (b) at the same speed (c) slower but stronger (d) not at all
34. 34.⚙️ A 30-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
35. 35.True or false: “the output is stronger” happens when a small gear drives a big one. (a) True (b) False
36. 36.⚙️ 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
37. 37.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
38. 38.⚙️ An 8-tooth driver gear turns a 20-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
39. 39.⚙️ A 20-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
40. 40.⚙️ 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

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