Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 903 · 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.⚙️ A 10-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
2. 2.⚙️ 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
3. 3.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
4. 4.⚙️ 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
5. 5.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
6. 6.True or false: “the output turns slower” happens when a big gear drives a small one. (a) True (b) False
7. 7.True or false: “the output turns slower” happens when a small gear drives a big one. (a) True (b) False
8. 8.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) True (b) False
9. 9.⚙️ 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
10. 10.⚙️ 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
11. 11.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
12. 12.⚙️ 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
13. 13.True or false: “the output is weaker” happens when a big gear drives a small one. (a) False (b) True
14. 14.⚙️ A big gear drives a small gear. The small gear turns … (a) faster but weaker (b) at the same speed (c) slower but stronger (d) not at all
15. 15.⚙️ 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
16. 16.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
17. 17.⚙️ Two gears are meshed together. How do they turn? (a) in opposite directions (b) they do not turn (c) the same direction (d) one up, one down
18. 18.⚙️ A 24-tooth driver gear turns a 40-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
19. 19.⚙️ A 36-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
20. 20.True or false: “the output is stronger” happens when a small gear drives a big one. (a) False (b) True
21. 21.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 2 turn? (a) clockwise (b) anticlockwise
22. 22.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) big drives small (b) small drives big
23. 23.⚙️ The gear fixed to the motor is called the … (a) idler gear (b) driver gear (c) tyre (d) driven gear
24. 24.⚙️ 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
25. 25.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) True (b) False
26. 26.True or false: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True
27. 27.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
28. 28.⚙️ A 24-tooth driver gear turns an 8-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
29. 29.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
30. 30.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
31. 31.⚙️ 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
32. 32.⚙️ 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
33. 33.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 4 turn? (a) clockwise (b) anticlockwise
34. 34.True or false: “the output is stronger” happens when a big gear drives a small one. (a) True (b) False
35. 35.⚙️ What are the bumps round the edge of a gear called? (a) teeth (b) tyres (c) pins (d) spokes
36. 36.⚙️ A 30-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
37. 37.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
38. 38.⚙️ A 40-tooth driver gear turns a 40-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
39. 39.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
40. 40.⚙️ 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

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