Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 455 · 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.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
2. 2.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
3. 3.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
4. 4.⚙️ What are the bumps round the edge of a gear called? (a) teeth (b) spokes (c) pins (d) tyres
5. 5.⚙️ 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
6. 6.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
7. 7.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
8. 8.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 3 turn? (a) anticlockwise (b) clockwise
9. 9.⚙️ A big gear drives a small gear. The small gear turns … (a) at the same speed (b) not at all (c) slower but stronger (d) faster but weaker
10. 10.⚙️ A 30-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
11. 11.⚙️ 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
12. 12.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
13. 13.⚙️ 7 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 7 turn? (a) clockwise (b) anticlockwise
14. 14.⚙️ 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
15. 15.⚙️ 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
16. 16.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 6 turn? (a) clockwise (b) anticlockwise
17. 17.⚙️ 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
18. 18.⚙️ A 12-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
19. 19.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
20. 20.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
21. 21.⚙️ A 15-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
22. 22.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
23. 23.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) True (b) False
24. 24.⚙️ The gear fixed to the motor is called the … (a) driven gear (b) idler gear (c) tyre (d) driver gear
25. 25.⚙️ 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
26. 26.⚙️ 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
27. 27.⚙️ A 36-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
28. 28.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
29. 29.⚙️ 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
30. 30.True or false: “the output is weaker” happens when a big gear drives a small one. (a) False (b) True
31. 31.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) True (b) False
32. 32.True or false: “the output turns slower” happens when a small gear drives a big one. (a) False (b) True
33. 33.True or false: “the output turns faster” happens when a big gear drives a small one. (a) True (b) False
34. 34.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) False (b) True
35. 35.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) False (b) True
36. 36.⚙️ A 12-tooth driver gear turns a 16-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
37. 37.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) True (b) False
38. 38.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
39. 39.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
40. 40.⚙️ A 10-tooth driver gear turns a 40-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster

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