Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 456 · 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.⚙️ A 12-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
3. 3.⚙️ An 8-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
4. 4.⚙️ 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
5. 5.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) True (b) False
6. 6.True or false: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True
7. 7.⚙️ A 30-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
8. 8.⚙️ 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
9. 9.⚙️ A 40-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
10. 10.⚙️ 5 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 5 turn? (a) anticlockwise (b) clockwise
11. 11.⚙️ What are the bumps round the edge of a gear called? (a) spokes (b) teeth (c) pins (d) tyres
12. 12.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
13. 13.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) False (b) True
14. 14.⚙️ A 36-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
15. 15.⚙️ Two gears are meshed together. How do they turn? (a) the same direction (b) in opposite directions (c) they do not turn (d) one up, one down
16. 16.True or false: “the output is weaker” happens when a big gear drives a small one. (a) False (b) True
17. 17.⚙️ A 16-tooth driver gear turns a 20-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
18. 18.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) True (b) False
19. 19.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
20. 20.⚙️ A 40-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
21. 21.⚙️ 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
22. 22.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) True (b) False
23. 23.True or false: “the output is stronger” happens when a small gear drives a big one. (a) False (b) True
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) anticlockwise (b) clockwise
26. 26.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
27. 27.⚙️ A 20-tooth driver gear turns a 40-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
28. 28.⚙️ A 40-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
29. 29.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
30. 30.⚙️ 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
31. 31.⚙️ The gear fixed to the motor is called the … (a) driver gear (b) idler gear (c) driven gear (d) tyre
32. 32.⚙️ 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
33. 33.⚙️ 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
34. 34.True or false: “the output is weaker” happens when a small gear drives a big one. (a) False (b) True
35. 35.⚙️ 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
36. 36.⚙️ A small gear drives a big gear. The big gear turns … (a) at the same speed (b) slower but stronger (c) faster and weaker (d) not at all
37. 37.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) big drives small (b) small drives big
38. 38.⚙️ A 40-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
39. 39.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
40. 40.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) False (b) True

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