Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 298 · 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.⚙️ 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
2. 2.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
3. 3.⚙️ The gear fixed to the motor is called the … (a) driven gear (b) idler gear (c) tyre (d) driver gear
4. 4.⚙️ Two gears are meshed together. How do they turn? (a) one up, one down (b) in opposite directions (c) they do not turn (d) the same direction
5. 5.True or false: “the output is stronger” happens when a small gear drives a big one. (a) False (b) True
6. 6.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) False (b) True
7. 7.⚙️ A small gear drives a big gear. The big gear turns … (a) slower but stronger (b) not at all (c) faster and weaker (d) at the same speed
8. 8.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) False (b) True
9. 9.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
10. 10.⚙️ 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
11. 11.⚙️ A 24-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
12. 12.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
13. 13.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) True (b) False
14. 14.⚙️ 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
15. 15.⚙️ A 24-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
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 40-tooth driver gear turns a 12-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 10-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
19. 19.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
20. 20.True or false: “the output turns slower” happens when a small gear drives a big one. (a) True (b) False
21. 21.True or false: “the output turns faster” happens when a small gear drives a big one. (a) True (b) False
22. 22.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) False (b) True
23. 23.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
24. 24.⚙️ What are the bumps round the edge of a gear called? (a) spokes (b) tyres (c) teeth (d) pins
25. 25.⚙️ 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
26. 26.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
27. 27.⚙️ A 36-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
28. 28.⚙️ 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
29. 29.⚙️ A 12-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
30. 30.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
31. 31.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
32. 32.⚙️ A 10-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
33. 33.⚙️ A 36-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
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.⚙️ 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
36. 36.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 3 turn? (a) anticlockwise (b) clockwise
37. 37.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B 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.True or false: “the output is weaker” happens when a small gear drives a big one. (a) False (b) True
40. 40.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) True (b) False

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