Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 272 · 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) small drives big (b) big drives small
2. 2.⚙️ A 24-tooth driver gear turns a 24-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
3. 3.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
4. 4.⚙️ A 16-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
5. 5.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
6. 6.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) False (b) True
7. 7.⚙️ 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
8. 8.⚙️ A 10-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
9. 9.⚙️ 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
10. 10.⚙️ A small gear drives a big gear. The big gear turns … (a) not at all (b) at the same speed (c) faster and weaker (d) slower but stronger
11. 11.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) True (b) False
12. 12.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
13. 13.⚙️ What are the bumps round the edge of a gear called? (a) pins (b) spokes (c) teeth (d) tyres
14. 14.⚙️ 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
15. 15.⚙️ The gear fixed to the motor is called the … (a) tyre (b) driver gear (c) idler gear (d) driven gear
16. 16.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
17. 17.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
18. 18.⚙️ A big gear drives a small gear. The small gear turns … (a) not at all (b) faster but weaker (c) slower but stronger (d) at the same speed
19. 19.⚙️ An 8-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
20. 20.True or false: “the output turns faster” happens when a big gear drives a small one. (a) True (b) False
21. 21.⚙️ 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
22. 22.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) False (b) True
23. 23.⚙️ A 24-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
24. 24.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) False (b) True
25. 25.⚙️ Two gears are meshed together. How do they turn? (a) they do not turn (b) the same direction (c) one up, one down (d) in opposite directions
26. 26.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) False (b) True
27. 27.True or false: “the output is weaker” happens when a big gear drives a small one. (a) True (b) False
28. 28.⚙️ A 15-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
29. 29.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 4 turn? (a) anticlockwise (b) clockwise
30. 30.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
31. 31.⚙️ 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
32. 32.⚙️ A 36-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
33. 33.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) False (b) True
34. 34.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
35. 35.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
36. 36.True or false: “the output is stronger” happens when a big gear drives a small one. (a) True (b) False
37. 37.⚙️ 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
38. 38.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
39. 39.⚙️ An 8-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
40. 40.⚙️ 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

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