Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 545 · 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.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
3. 3.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) True (b) False
4. 4.⚙️ A small gear drives a big gear. The big gear turns … (a) faster and weaker (b) not at all (c) slower but stronger (d) at the same speed
5. 5.⚙️ 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
6. 6.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
7. 7.⚙️ The gear fixed to the motor is called the … (a) driver gear (b) tyre (c) driven gear (d) idler gear
8. 8.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
9. 9.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) True (b) False
10. 10.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
11. 11.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
12. 12.⚙️ A 16-tooth driver gear turns an 8-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
13. 13.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 3 turn? (a) clockwise (b) anticlockwise
14. 14.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
15. 15.⚙️ 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 big driver gear (b) a small driver gear
16. 16.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
17. 17.⚙️ Two gears are meshed together. How do they turn? (a) the same direction (b) they do not turn (c) one up, one down (d) in opposite directions
18. 18.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) True (b) False
19. 19.⚙️ A 16-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
20. 20.⚙️ A big gear drives a small gear. The small gear turns … (a) at the same speed (b) faster but weaker (c) slower but stronger (d) not at all
21. 21.⚙️ What are the bumps round the edge of a gear called? (a) spokes (b) tyres (c) pins (d) teeth
22. 22.⚙️ A 36-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
23. 23.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
24. 24.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
25. 25.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) False (b) True
26. 26.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
27. 27.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) True (b) False
28. 28.True or false: “the output is stronger” happens when a small gear drives a big one. (a) True (b) False
29. 29.True or false: “the output turns slower” happens when a small gear drives a big one. (a) False (b) True
30. 30.⚙️ 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
31. 31.⚙️ A 12-tooth driver gear turns a 20-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
32. 32.True or false: “the output turns faster” happens when a big gear drives a small one. (a) True (b) False
33. 33.⚙️ 7 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 7 turn? (a) clockwise (b) anticlockwise
34. 34.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) True (b) False
35. 35.⚙️ 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
36. 36.⚙️ 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
37. 37.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 4 turn? (a) clockwise (b) anticlockwise
38. 38.⚙️ 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
39. 39.⚙️ A 20-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
40. 40.True or false: “the output is weaker” happens when a small gear drives a big one. (a) False (b) True

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