Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 108 · 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 small driver gear (b) a big driver gear
2. 2.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) False (b) True
3. 3.⚙️ 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
4. 4.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
5. 5.⚙️ 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
6. 6.True or false: “the output is weaker” happens when a small gear drives a big one. (a) True (b) False
7. 7.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
8. 8.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
9. 9.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 2 turn? (a) anticlockwise (b) clockwise
10. 10.⚙️ 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
11. 11.True or false: “the output is stronger” happens when a small gear drives a big one. (a) False (b) True
12. 12.⚙️ A big gear drives a small gear. The small gear turns … (a) faster but weaker (b) slower but stronger (c) at the same speed (d) not at all
13. 13.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
14. 14.⚙️ 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
15. 15.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
16. 16.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) False (b) True
17. 17.⚙️ What are the bumps round the edge of a gear called? (a) pins (b) spokes (c) tyres (d) teeth
18. 18.⚙️ A small gear drives a big gear. The big gear turns … (a) at the same speed (b) not at all (c) slower but stronger (d) faster and weaker
19. 19.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) True (b) False
20. 20.⚙️ 5 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 5 turn? (a) anticlockwise (b) clockwise
21. 21.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
22. 22.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
23. 23.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) False (b) True
24. 24.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) False (b) True
25. 25.⚙️ The gear fixed to the motor is called the … (a) idler gear (b) tyre (c) driver gear (d) driven gear
26. 26.True or false: “the output turns slower” happens when a small gear drives a big one. (a) False (b) True
27. 27.⚙️ 5 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 5 turn? (a) clockwise (b) anticlockwise
28. 28.⚙️ A 10-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
29. 29.⚙️ A 12-tooth driver gear turns a 16-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
30. 30.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
31. 31.⚙️ 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
32. 32.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
33. 33.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) True (b) False
34. 34.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 6 turn? (a) clockwise (b) anticlockwise
35. 35.⚙️ A 16-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
36. 36.True or false: “the output is weaker” happens when a big gear drives a small one. (a) False (b) True
37. 37.⚙️ A 20-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) faster (c) slower
38. 38.⚙️ A 12-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
39. 39.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) True (b) False
40. 40.⚙️ A 40-tooth driver gear turns a 40-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster

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