Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 953 · 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 small gear drives a big gear. The big gear turns … (a) not at all (b) at the same speed (c) faster and weaker (d) slower but stronger
2. 2.⚙️ 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
3. 3.⚙️ What are the bumps round the edge of a gear called? (a) pins (b) spokes (c) teeth (d) tyres
4. 4.⚙️ 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
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 big driver gear (b) a small driver gear
6. 6.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
7. 7.⚙️ The gear fixed to the motor is called the … (a) idler gear (b) driven gear (c) tyre (d) driver gear
8. 8.⚙️ A 16-tooth driver gear turns a 40-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
9. 9.⚙️ A 30-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
10. 10.⚙️ A 40-tooth driver gear turns an 8-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
11. 11.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
12. 12.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
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.True or false: “the output is weaker” happens when a small gear drives a big one. (a) True (b) False
15. 15.⚙️ 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
16. 16.⚙️ 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
17. 17.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
18. 18.⚙️ 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
19. 19.⚙️ Two gears are meshed together. How do they turn? (a) one up, one down (b) the same direction (c) in opposite directions (d) they do not turn
20. 20.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) True (b) False
21. 21.⚙️ A 20-tooth driver gear turns a 24-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
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.⚙️ A big gear drives a small gear. The small gear turns … (a) not at all (b) at the same speed (c) slower but stronger (d) faster but weaker
24. 24.⚙️ 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
25. 25.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
26. 26.⚙️ 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
27. 27.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) False (b) True
28. 28.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
29. 29.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
30. 30.⚙️ An 8-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
31. 31.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
32. 32.True or false: “the output turns faster” 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.⚙️ 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
35. 35.True or false: “the output turns slower” happens when a small gear drives a big one. (a) True (b) False
36. 36.⚙️ A 15-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
37. 37.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) True (b) False
38. 38.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) False (b) True
39. 39.True or false: “the output is weaker” happens when a big gear drives a small one. (a) True (b) False
40. 40.⚙️ 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

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