Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 875 · 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 10-tooth driver gear turns a 24-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
3. 3.⚙️ 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
4. 4.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
5. 5.⚙️ Two gears are meshed together. How do they turn? (a) they do not turn (b) one up, one down (c) the same direction (d) in opposite directions
6. 6.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) True (b) False
7. 7.True or false: “the output is weaker” happens when a small gear drives a big one. (a) False (b) True
8. 8.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) True (b) False
9. 9.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
10. 10.⚙️ 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
11. 11.⚙️ 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
12. 12.⚙️ A small gear drives a big gear. The big gear turns … (a) at the same speed (b) not at all (c) slower but stronger (d) faster and weaker
13. 13.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
14. 14.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 4 turn? (a) clockwise (b) anticlockwise
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.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 2 turn? (a) clockwise (b) anticlockwise
17. 17.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) True (b) False
18. 18.⚙️ 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
19. 19.⚙️ An 8-tooth driver gear turns a 12-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
20. 20.True or false: “the output turns slower” happens when a big gear drives a small one. (a) True (b) False
21. 21.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) True (b) False
22. 22.⚙️ 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
23. 23.⚙️ What are the bumps round the edge of a gear called? (a) spokes (b) teeth (c) pins (d) tyres
24. 24.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
25. 25.⚙️ 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
26. 26.⚙️ The gear fixed to the motor is called the … (a) driver gear (b) driven gear (c) idler gear (d) tyre
27. 27.⚙️ 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
28. 28.⚙️ A big gear drives a small gear. The small gear turns … (a) faster but weaker (b) not at all (c) at the same speed (d) slower but stronger
29. 29.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
30. 30.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
31. 31.True or false: “the output turns faster” happens when a small gear drives a big one. (a) True (b) False
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.⚙️ 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
34. 34.True or false: “the output turns slower” happens when a small gear drives a big one. (a) True (b) False
35. 35.⚙️ 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
36. 36.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
37. 37.⚙️ A 40-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
38. 38.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
39. 39.⚙️ A 40-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
40. 40.⚙️ 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

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