Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 862 · 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.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
2. 2.⚙️ What are the bumps round the edge of a gear called? (a) teeth (b) pins (c) tyres (d) spokes
3. 3.⚙️ 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
4. 4.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
5. 5.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
6. 6.⚙️ 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
7. 7.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) True (b) False
8. 8.True or false: “the output is weaker” happens when a big gear drives a small one. (a) True (b) False
9. 9.⚙️ The gear fixed to the motor is called the … (a) tyre (b) idler gear (c) driver gear (d) driven gear
10. 10.⚙️ A small gear drives a big gear. The big gear turns … (a) slower but stronger (b) faster and weaker (c) at the same speed (d) not at all
11. 11.⚙️ A 40-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) faster (c) slower
12. 12.⚙️ Two gears are meshed together. How do they turn? (a) the same direction (b) they do not turn (c) in opposite directions (d) one up, one down
13. 13.⚙️ 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
14. 14.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
15. 15.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) True (b) False
16. 16.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) True (b) False
17. 17.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
18. 18.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
19. 19.⚙️ A 20-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
20. 20.⚙️ A 10-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) faster (c) slower
21. 21.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
22. 22.⚙️ 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
23. 23.⚙️ 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
24. 24.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 6 turn? (a) anticlockwise (b) clockwise
25. 25.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) big drives small (b) small drives big
26. 26.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
27. 27.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
28. 28.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) False (b) True
29. 29.⚙️ 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
30. 30.⚙️ A big gear drives a small gear. The small gear turns … (a) at the same speed (b) not at all (c) slower but stronger (d) faster but weaker
31. 31.True or false: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True
32. 32.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) False (b) True
33. 33.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) True (b) False
34. 34.⚙️ Pulley A turns clockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) clockwise (b) anticlockwise
35. 35.⚙️ Pulley A turns anticlockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) anticlockwise (b) clockwise
36. 36.⚙️ 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
37. 37.True or false: “the output is stronger” happens when a small gear drives a big one. (a) False (b) True
38. 38.⚙️ A 30-tooth driver gear turns a 15-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 30-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
40. 40.⚙️ 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

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