Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 994 · 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.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
2. 2.⚙️ 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
3. 3.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
4. 4.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) True (b) False
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.True or false: “the output turns faster” happens when a small gear drives a big one. (a) True (b) False
7. 7.⚙️ What are the bumps round the edge of a gear called? (a) pins (b) tyres (c) teeth (d) spokes
8. 8.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
9. 9.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) False (b) True
10. 10.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
11. 11.⚙️ 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
12. 12.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
13. 13.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) False (b) True
14. 14.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 6 turn? (a) anticlockwise (b) clockwise
15. 15.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
16. 16.True or false: “the output is stronger” happens when a big gear drives a small one. (a) True (b) False
17. 17.⚙️ 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
18. 18.⚙️ The gear fixed to the motor is called the … (a) driven gear (b) idler gear (c) tyre (d) driver gear
19. 19.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) True (b) False
20. 20.⚙️ A small gear drives a big gear. The big gear turns … (a) at the same speed (b) faster and weaker (c) not at all (d) slower but stronger
21. 21.⚙️ Two gears are meshed together. How do they turn? (a) in opposite directions (b) one up, one down (c) the same direction (d) they do not turn
22. 22.⚙️ 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
23. 23.⚙️ 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
24. 24.True or false: “the output is weaker” happens when a small gear drives a big one. (a) True (b) False
25. 25.True or false: “the output is stronger” happens when a small gear drives a big one. (a) False (b) True
26. 26.⚙️ A 20-tooth driver gear turns a 15-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
27. 27.⚙️ A 10-tooth driver gear turns a 20-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 a fast fan”? (a) big drives small (b) small drives big
29. 29.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
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) anticlockwise (b) clockwise
31. 31.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
32. 32.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 4 turn? (a) clockwise (b) anticlockwise
33. 33.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
34. 34.⚙️ 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
35. 35.⚙️ 7 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 7 turn? (a) anticlockwise (b) clockwise
36. 36.⚙️ An 8-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) slower (c) faster
37. 37.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 4 turn? (a) anticlockwise (b) clockwise
38. 38.True or false: “the output turns faster” happens when a big gear drives a small one. (a) True (b) False
39. 39.⚙️ A 12-tooth driver gear turns a 24-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
40. 40.⚙️ A 12-tooth driver gear turns an 8-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed

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