Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 878 · 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: “good for a slow crane” happens when a big gear drives a small one. (a) True (b) False
2. 2.True or false: “the output is stronger” happens when a small gear drives a big one. (a) True (b) False
3. 3.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
4. 4.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) True (b) False
5. 5.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
6. 6.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
7. 7.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
8. 8.⚙️ A big gear drives a small gear. The small gear turns … (a) at the same speed (b) slower but stronger (c) faster but weaker (d) not at all
9. 9.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
10. 10.⚙️ Two gears are meshed together. How do they turn? (a) the same direction (b) in opposite directions (c) one up, one down (d) they do not turn
11. 11.⚙️ 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
12. 12.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) True (b) False
13. 13.⚙️ Pulley A turns clockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) anticlockwise (b) clockwise
14. 14.⚙️ 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
15. 15.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) True (b) False
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.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
18. 18.⚙️ 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
19. 19.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) False (b) True
20. 20.⚙️ 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
21. 21.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) True (b) False
22. 22.⚙️ The gear fixed to the motor is called the … (a) driver gear (b) idler gear (c) tyre (d) driven gear
23. 23.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
24. 24.⚙️ 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
25. 25.True or false: “the output turns slower” happens when a small gear drives a big one. (a) False (b) True
26. 26.⚙️ A 12-tooth driver gear turns a 40-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
27. 27.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) big drives small (b) small drives big
28. 28.⚙️ A 30-tooth driver gear turns a 16-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
29. 29.⚙️ A small gear drives a big gear. The big gear turns … (a) not at all (b) slower but stronger (c) faster and weaker (d) at the same speed
30. 30.⚙️ A 12-tooth driver gear turns a 24-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
31. 31.True or false: “the output is weaker” happens when a small gear drives a big one. (a) True (b) False
32. 32.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
33. 33.⚙️ A 15-tooth driver gear turns a 15-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
34. 34.⚙️ 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
35. 35.⚙️ What are the bumps round the edge of a gear called? (a) tyres (b) spokes (c) pins (d) teeth
36. 36.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
37. 37.⚙️ An 8-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
38. 38.⚙️ A 12-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
39. 39.⚙️ A 10-tooth driver gear turns a 16-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
40. 40.⚙️ 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

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