Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 613 · 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.⚙️ 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
2. 2.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
3. 3.⚙️ A 40-tooth driver gear turns a 12-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
4. 4.⚙️ The gear fixed to the motor is called the … (a) driven gear (b) idler gear (c) driver gear (d) tyre
5. 5.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
6. 6.⚙️ Two gears are meshed together. How do they turn? (a) in opposite directions (b) the same direction (c) they do not turn (d) one up, one down
7. 7.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) True (b) False
8. 8.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
9. 9.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
10. 10.⚙️ 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
11. 11.⚙️ 5 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 5 turn? (a) anticlockwise (b) clockwise
12. 12.⚙️ 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
13. 13.⚙️ 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
14. 14.⚙️ 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
15. 15.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 3 turn? (a) clockwise (b) anticlockwise
16. 16.⚙️ A big gear drives a small gear. The small gear turns … (a) slower but stronger (b) at the same speed (c) faster but weaker (d) not at all
17. 17.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
18. 18.⚙️ A small gear drives a big gear. The big gear turns … (a) slower but stronger (b) faster and weaker (c) at the same speed (d) not at all
19. 19.True or false: “the output turns slower” happens when a small gear drives a big one. (a) True (b) False
20. 20.True or false: “the output is weaker” happens when a big gear drives a small one. (a) True (b) False
21. 21.⚙️ 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
22. 22.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) True (b) False
23. 23.⚙️ 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
24. 24.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) False (b) True
25. 25.⚙️ A 15-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
26. 26.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
27. 27.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
28. 28.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
29. 29.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
30. 30.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
31. 31.⚙️ What are the bumps round the edge of a gear called? (a) pins (b) tyres (c) teeth (d) spokes
32. 32.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) False (b) True
33. 33.⚙️ 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
34. 34.True or false: “the output is weaker” happens when a small gear drives a big one. (a) False (b) True
35. 35.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
36. 36.⚙️ A 16-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) faster (c) slower
37. 37.⚙️ 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
38. 38.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) True (b) False
39. 39.⚙️ A 30-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
40. 40.True or false: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True

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