Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 424 · 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.⚙️ What are the bumps round the edge of a gear called? (a) tyres (b) teeth (c) spokes (d) pins
2. 2.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
3. 3.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 2 turn? (a) anticlockwise (b) clockwise
4. 4.True or false: “the output turns slower” happens when a big gear drives a small one. (a) True (b) False
5. 5.⚙️ The gear fixed to the motor is called the … (a) driven gear (b) idler gear (c) tyre (d) driver gear
6. 6.⚙️ A 12-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
7. 7.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) False (b) True
8. 8.⚙️ 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
9. 9.⚙️ A big gear drives a small gear. The small gear turns … (a) at the same speed (b) slower but stronger (c) not at all (d) faster but weaker
10. 10.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
11. 11.True or false: “the output is stronger” happens when a small gear drives a big one. (a) True (b) False
12. 12.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
13. 13.⚙️ 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
14. 14.⚙️ 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
15. 15.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
16. 16.⚙️ A 12-tooth driver gear turns a 16-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
17. 17.⚙️ A 16-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
18. 18.⚙️ 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
19. 19.⚙️ Two gears are meshed together. How do they turn? (a) the same direction (b) in opposite directions (c) one up, one down (d) they do not turn
20. 20.True or false: “the output is weaker” happens when a small gear drives a big one. (a) False (b) True
21. 21.⚙️ 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
22. 22.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) False (b) True
23. 23.True or false: “the output turns faster” happens when a small gear drives a big one. (a) True (b) False
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 racing toy”? (a) big drives small (b) small drives big
26. 26.⚙️ 5 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 5 turn? (a) clockwise (b) anticlockwise
27. 27.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
28. 28.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) True (b) False
29. 29.⚙️ An 8-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
30. 30.⚙️ 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
31. 31.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) False (b) True
32. 32.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 3 turn? (a) clockwise (b) anticlockwise
33. 33.True or false: “the output turns faster” happens when a big gear drives a small one. (a) False (b) True
34. 34.⚙️ 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
35. 35.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
36. 36.⚙️ A 20-tooth driver gear turns a 16-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
37. 37.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) True (b) False
38. 38.True or false: “the output is weaker” happens when a big gear drives a small one. (a) False (b) True
39. 39.⚙️ 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
40. 40.⚙️ A 30-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

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