Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 770 · 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 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
2. 2.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
3. 3.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
4. 4.⚙️ A 16-tooth driver gear turns a 16-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
5. 5.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
6. 6.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
7. 7.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
8. 8.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
9. 9.True or false: “the output turns slower” happens when a small gear drives a big one. (a) True (b) False
10. 10.⚙️ 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
11. 11.⚙️ 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
12. 12.⚙️ A small gear drives a big gear. The big gear turns … (a) not at all (b) faster and weaker (c) at the same speed (d) slower but stronger
13. 13.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 4 turn? (a) anticlockwise (b) clockwise
14. 14.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
15. 15.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
16. 16.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) True (b) False
17. 17.True or false: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True
18. 18.⚙️ 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
19. 19.⚙️ What are the bumps round the edge of a gear called? (a) spokes (b) teeth (c) pins (d) tyres
20. 20.⚙️ A 12-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
21. 21.⚙️ 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
22. 22.⚙️ Two gears are meshed together. How do they turn? (a) in opposite directions (b) they do not turn (c) one up, one down (d) the same direction
23. 23.True or false: “the output is stronger” happens when a small gear drives a big one. (a) True (b) False
24. 24.⚙️ 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
25. 25.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
26. 26.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) True (b) False
27. 27.⚙️ A 15-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
28. 28.⚙️ A 10-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
29. 29.⚙️ 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
30. 30.⚙️ A 12-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
31. 31.True or false: “the output turns faster” happens when a big gear drives a small one. (a) True (b) False
32. 32.⚙️ A big gear drives a small gear. The small gear turns … (a) slower but stronger (b) at the same speed (c) faster but weaker (d) not at all
33. 33.⚙️ 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
34. 34.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) False (b) True
35. 35.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
36. 36.⚙️ A 16-tooth driver gear turns a 24-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
37. 37.⚙️ A 15-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
38. 38.⚙️ The gear fixed to the motor is called the … (a) driven gear (b) driver gear (c) idler gear (d) tyre
39. 39.⚙️ A 36-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.⚙️ An 8-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

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