Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 641 · 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.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
2. 2.⚙️ The gear fixed to the motor is called the … (a) idler gear (b) tyre (c) driven gear (d) driver gear
3. 3.True or false: “the output turns faster” happens when a big gear drives a small one. (a) True (b) False
4. 4.⚙️ Two gears are meshed together. How do they turn? (a) one up, one down (b) in opposite directions (c) the same direction (d) they do not turn
5. 5.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
6. 6.⚙️ What are the bumps round the edge of a gear called? (a) tyres (b) teeth (c) pins (d) spokes
7. 7.⚙️ 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
8. 8.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
9. 9.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
10. 10.⚙️ 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
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.⚙️ A 40-tooth driver gear turns an 8-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
13. 13.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
14. 14.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
15. 15.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
16. 16.⚙️ 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
17. 17.⚙️ 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
18. 18.⚙️ 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
19. 19.⚙️ 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
20. 20.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) True (b) False
21. 21.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
22. 22.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
23. 23.True or false: “the output is weaker” happens when a big gear drives a small one. (a) True (b) False
24. 24.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
25. 25.⚙️ A big gear drives a small gear. The small gear turns … (a) faster but weaker (b) at the same speed (c) not at all (d) slower but stronger
26. 26.True or false: “the output is weaker” happens when a small gear drives a big one. (a) False (b) True
27. 27.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) False (b) True
28. 28.⚙️ 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
29. 29.⚙️ A 30-tooth driver gear turns a 15-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
30. 30.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) False (b) True
31. 31.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 6 turn? (a) clockwise (b) anticlockwise
32. 32.⚙️ 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
33. 33.⚙️ A 10-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
34. 34.⚙️ 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
35. 35.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) True (b) False
36. 36.⚙️ A 15-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
37. 37.⚙️ 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
38. 38.True or false: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True
39. 39.⚙️ An 8-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
40. 40.True or false: “the output is stronger” happens when a small gear drives a big one. (a) False (b) True

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