Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 834 · 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) pins (b) spokes (c) teeth (d) tyres
2. 2.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) False (b) True
3. 3.⚙️ 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
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.⚙️ 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
6. 6.⚙️ 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
7. 7.⚙️ 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
8. 8.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
9. 9.⚙️ The gear fixed to the motor is called the … (a) driven gear (b) driver gear (c) tyre (d) idler gear
10. 10.True or false: “the output turns slower” happens when a big gear drives a small one. (a) True (b) False
11. 11.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 4 turn? (a) anticlockwise (b) clockwise
12. 12.⚙️ 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
13. 13.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
14. 14.⚙️ 7 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 7 turn? (a) anticlockwise (b) clockwise
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) anticlockwise (b) clockwise
16. 16.True or false: “the output turns slower” happens when a small gear drives a big one. (a) False (b) True
17. 17.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 6 turn? (a) anticlockwise (b) clockwise
18. 18.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
19. 19.⚙️ Two gears are meshed together. How do they turn? (a) in opposite directions (b) they do not turn (c) one up, one down (d) the same direction
20. 20.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) big drives small (b) small drives big
21. 21.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) False (b) True
22. 22.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
23. 23.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) False (b) True
24. 24.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) False (b) True
25. 25.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
26. 26.True or false: “the output is weaker” happens when a small gear drives a big one. (a) True (b) False
27. 27.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
28. 28.True or false: “the output turns faster” happens when a small gear drives a big one. (a) True (b) False
29. 29.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
30. 30.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
31. 31.⚙️ 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) faster (c) slower
32. 32.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
33. 33.⚙️ 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
34. 34.⚙️ A 20-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
35. 35.True or false: “the output is weaker” happens when a big gear drives a small one. (a) False (b) True
36. 36.True or false: “the output is stronger” happens when a small gear drives a big one. (a) False (b) True
37. 37.True or false: “the output is stronger” happens when a big gear drives a small one. (a) True (b) False
38. 38.⚙️ A big gear drives a small gear. The small gear turns … (a) slower but stronger (b) not at all (c) at the same speed (d) faster but weaker
39. 39.⚙️ A 20-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
40. 40.⚙️ A 12-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

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