Robotics Worksheet: Gears – Speed or Strength

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

Free robotics lessons, practice and worksheets at talentjr.in/robotics-for-kids