Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 539 · 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 stronger” happens when a big gear drives a small one. (a) False (b) True
2. 2.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) True (b) False
3. 3.True or false: “the output is stronger” happens when a small gear drives a big one. (a) True (b) False
4. 4.True or false: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True
5. 5.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
6. 6.⚙️ A 20-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
7. 7.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) big drives small (b) small drives big
8. 8.⚙️ 7 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 7 turn? (a) anticlockwise (b) clockwise
9. 9.⚙️ 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
10. 10.⚙️ A 40-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
11. 11.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 3 turn? (a) anticlockwise (b) clockwise
12. 12.⚙️ A 40-tooth driver gear turns a 24-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
13. 13.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
14. 14.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
15. 15.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
16. 16.⚙️ Two gears are meshed together. How do they turn? (a) in opposite directions (b) the same direction (c) they do not turn (d) one up, one down
17. 17.True or false: “the output is weaker” happens when a small gear drives a big one. (a) False (b) True
18. 18.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
19. 19.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
20. 20.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) False (b) True
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 small driver gear (b) a big driver gear
22. 22.⚙️ The gear fixed to the motor is called the … (a) idler gear (b) driver gear (c) tyre (d) driven gear
23. 23.⚙️ A big gear drives a small gear. The small gear turns … (a) not at all (b) faster but weaker (c) at the same speed (d) slower but stronger
24. 24.⚙️ 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
25. 25.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
26. 26.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) False (b) True
27. 27.⚙️ A 30-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
28. 28.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
29. 29.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) True (b) False
30. 30.⚙️ 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
31. 31.True or false: “the output is weaker” happens when a big gear drives a small one. (a) False (b) True
32. 32.⚙️ 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
33. 33.⚙️ 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
34. 34.⚙️ A 15-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
35. 35.⚙️ 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
36. 36.⚙️ 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
37. 37.True or false: “the output turns faster” happens when a big gear drives a small one. (a) True (b) False
38. 38.⚙️ 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
39. 39.⚙️ What are the bumps round the edge of a gear called? (a) spokes (b) pins (c) tyres (d) teeth
40. 40.⚙️ 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

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