Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 398 · 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: “good for a racing toy” happens when a big gear drives a small one. (a) False (b) True
2. 2.⚙️ The gear fixed to the motor is called the … (a) idler gear (b) driver gear (c) driven gear (d) tyre
3. 3.⚙️ 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
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 small driver gear (b) a big driver gear
5. 5.⚙️ 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
6. 6.⚙️ A big gear drives a small gear. The small gear turns … (a) slower but stronger (b) faster but weaker (c) not at all (d) at the same speed
7. 7.True or false: “the output turns faster” happens when a big gear drives a small one. (a) False (b) True
8. 8.⚙️ 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
9. 9.⚙️ A 10-tooth driver gear turns a 15-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
10. 10.⚙️ Two gears are meshed together. How do they turn? (a) one up, one down (b) in opposite directions (c) the same direction (d) they do not turn
11. 11.True or false: “the output is weaker” happens when a small gear drives a big one. (a) False (b) True
12. 12.True or false: “the output is weaker” happens when a big gear drives a small one. (a) False (b) True
13. 13.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
14. 14.⚙️ A 24-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
15. 15.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
16. 16.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
17. 17.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
18. 18.⚙️ 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
19. 19.⚙️ 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
20. 20.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) False (b) True
21. 21.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
22. 22.⚙️ A 20-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
23. 23.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
24. 24.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
25. 25.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
26. 26.⚙️ 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
27. 27.⚙️ 5 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 5 turn? (a) clockwise (b) anticlockwise
28. 28.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) False (b) True
29. 29.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) big drives small (b) small drives big
30. 30.True or false: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True
31. 31.True or false: “the output turns slower” happens when a small gear drives a big one. (a) True (b) False
32. 32.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
33. 33.⚙️ 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
34. 34.⚙️ A small gear drives a big gear. The big gear turns … (a) slower but stronger (b) not at all (c) faster and weaker (d) at the same speed
35. 35.⚙️ A big gear drives a small gear. The small gear turns … (a) slower but stronger (b) not at all (c) faster but weaker (d) at the same speed
36. 36.⚙️ A 36-tooth driver gear turns a 12-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
37. 37.⚙️ A 30-tooth driver gear turns a 15-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
38. 38.⚙️ An 8-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
39. 39.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
40. 40.⚙️ What are the bumps round the edge of a gear called? (a) teeth (b) tyres (c) pins (d) spokes

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