Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 967 · 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.⚙️ 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
2. 2.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) True (b) False
3. 3.⚙️ What are the bumps round the edge of a gear called? (a) teeth (b) tyres (c) spokes (d) pins
4. 4.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
5. 5.⚙️ A big gear drives a small gear. The small gear turns … (a) slower but stronger (b) not at all (c) at the same speed (d) faster but weaker
6. 6.⚙️ A 12-tooth driver gear turns a 15-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
7. 7.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
8. 8.⚙️ 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
9. 9.⚙️ The gear fixed to the motor is called the … (a) idler gear (b) driven gear (c) driver gear (d) tyre
10. 10.⚙️ A 10-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
11. 11.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) True (b) False
12. 12.⚙️ A 12-tooth driver gear turns a 24-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
13. 13.⚙️ A small gear drives a big gear. The big gear turns … (a) at the same speed (b) not at all (c) faster and weaker (d) slower but stronger
14. 14.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) big drives small (b) small drives big
15. 15.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
16. 16.⚙️ A 15-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
17. 17.⚙️ 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
18. 18.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) True (b) False
19. 19.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
20. 20.⚙️ 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
21. 21.True or false: “the output turns faster” happens when a big gear drives a small one. (a) False (b) True
22. 22.⚙️ A 36-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
23. 23.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
24. 24.⚙️ 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
25. 25.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
26. 26.⚙️ An 8-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
27. 27.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
28. 28.⚙️ A 16-tooth driver gear turns a 16-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
29. 29.⚙️ A 20-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
30. 30.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) False (b) True
31. 31.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) False (b) True
32. 32.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
33. 33.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
34. 34.⚙️ A 36-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
35. 35.True or false: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True
36. 36.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) False (b) True
37. 37.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) False (b) True
38. 38.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
39. 39.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 6 turn? (a) clockwise (b) anticlockwise
40. 40.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) True (b) False

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