Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 300 · 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.⚙️ 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
3. 3.True or false: “the output turns slower” happens when a small gear drives a big one. (a) False (b) True
4. 4.True or false: “the output is stronger” happens when a small gear drives a big one. (a) False (b) True
5. 5.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
6. 6.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
7. 7.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) True (b) False
8. 8.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
9. 9.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
10. 10.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) True (b) False
11. 11.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
12. 12.⚙️ What are the bumps round the edge of a gear called? (a) tyres (b) pins (c) spokes (d) teeth
13. 13.⚙️ A big gear drives a small gear. The small gear turns … (a) at the same speed (b) slower but stronger (c) not at all (d) faster but weaker
14. 14.⚙️ Two gears are meshed together. How do they turn? (a) they do not turn (b) one up, one down (c) the same direction (d) in opposite directions
15. 15.True or false: “the output is weaker” happens when a big gear drives a small one. (a) True (b) False
16. 16.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
17. 17.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) False (b) True
18. 18.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 3 turn? (a) anticlockwise (b) clockwise
19. 19.⚙️ 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
20. 20.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
21. 21.⚙️ A 15-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
22. 22.⚙️ 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
23. 23.True or false: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True
24. 24.⚙️ A 36-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
25. 25.⚙️ A small gear drives a big gear. The big gear turns … (a) not at all (b) faster and weaker (c) slower but stronger (d) at the same speed
26. 26.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) True (b) False
27. 27.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
28. 28.⚙️ A 10-tooth driver gear turns a 20-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 24-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.⚙️ A 15-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
31. 31.⚙️ The gear fixed to the motor is called the … (a) tyre (b) driver gear (c) idler gear (d) driven gear
32. 32.⚙️ An 8-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
33. 33.⚙️ 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
34. 34.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
35. 35.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) False (b) True
36. 36.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 4 turn? (a) clockwise (b) anticlockwise
37. 37.⚙️ A 40-tooth driver gear turns an 8-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
38. 38.⚙️ 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
39. 39.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
40. 40.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big

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