Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 910 · 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.⚙️ 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
2. 2.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
3. 3.⚙️ 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
4. 4.⚙️ 7 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 7 turn? (a) clockwise (b) anticlockwise
5. 5.⚙️ 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
6. 6.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
7. 7.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
8. 8.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) False (b) True
9. 9.⚙️ Two gears are meshed together. How do they turn? (a) one up, one down (b) they do not turn (c) the same direction (d) in opposite directions
10. 10.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) big drives small (b) small drives big
11. 11.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
12. 12.True or false: “the output turns faster” happens when a big gear drives a small one. (a) True (b) False
13. 13.⚙️ 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
14. 14.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
15. 15.⚙️ 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
16. 16.⚙️ 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
17. 17.⚙️ A small gear drives a big gear. The big gear turns … (a) faster and weaker (b) not at all (c) at the same speed (d) slower but stronger
18. 18.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
19. 19.⚙️ What are the bumps round the edge of a gear called? (a) teeth (b) spokes (c) tyres (d) pins
20. 20.⚙️ A big gear drives a small gear. The small gear turns … (a) at the same speed (b) not at all (c) slower but stronger (d) faster but weaker
21. 21.True or false: “the output turns slower” happens when a small gear drives a big one. (a) True (b) False
22. 22.True or false: “the output is weaker” happens when a small gear drives a big one. (a) False (b) True
23. 23.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
24. 24.⚙️ The gear fixed to the motor is called the … (a) tyre (b) driven gear (c) idler gear (d) driver gear
25. 25.⚙️ A 24-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
26. 26.⚙️ 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
27. 27.⚙️ A 30-tooth driver gear turns a 16-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
28. 28.⚙️ A 10-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) slower (c) faster
29. 29.⚙️ A 15-tooth driver gear turns a 16-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
30. 30.⚙️ 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
31. 31.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
32. 32.True or false: “good for lifting loads” 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 big gear drives a small one. (a) False (b) True
34. 34.⚙️ A 24-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
35. 35.⚙️ Pulley A turns clockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) anticlockwise (b) clockwise
36. 36.⚙️ A 40-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
37. 37.⚙️ A 30-tooth driver gear turns a 15-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
38. 38.⚙️ A 24-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
39. 39.True or false: “the output is stronger” happens when a big gear drives a small one. (a) True (b) False
40. 40.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise

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