Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 767 · 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 a crossed belt (it makes an X). Which way does pulley B turn? (a) anticlockwise (b) clockwise
2. 2.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
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.⚙️ 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) faster (c) slower
5. 5.⚙️ 5 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 5 turn? (a) clockwise (b) anticlockwise
6. 6.⚙️ 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
7. 7.True or false: “the output is stronger” happens when a small gear drives a big one. (a) False (b) True
8. 8.⚙️ 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
9. 9.⚙️ What are the bumps round the edge of a gear called? (a) pins (b) teeth (c) tyres (d) spokes
10. 10.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
11. 11.True or false: “the output is weaker” happens when a big gear drives a small one. (a) False (b) True
12. 12.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) True (b) False
13. 13.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 3 turn? (a) anticlockwise (b) clockwise
14. 14.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) False (b) True
15. 15.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
16. 16.⚙️ 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
17. 17.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) False (b) True
18. 18.True or false: “the output is weaker” happens when a small gear drives a big one. (a) True (b) False
19. 19.True or false: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True
20. 20.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
21. 21.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
22. 22.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
23. 23.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) False (b) True
24. 24.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) False (b) True
25. 25.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
26. 26.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) False (b) True
27. 27.⚙️ 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
28. 28.⚙️ A 40-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
29. 29.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
30. 30.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
31. 31.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
32. 32.⚙️ 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
33. 33.⚙️ A 10-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
34. 34.⚙️ 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
35. 35.⚙️ A small gear drives a big gear. The big gear turns … (a) slower but stronger (b) not at all (c) faster and weaker (d) at the same speed
36. 36.⚙️ A 12-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
37. 37.⚙️ 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
38. 38.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 2 turn? (a) anticlockwise (b) clockwise
39. 39.True or false: “the output is stronger” happens when a big gear drives a small one. (a) True (b) False
40. 40.⚙️ A 10-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

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