Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 118 · 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.⚙️ 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
2. 2.⚙️ Two gears are meshed together. How do they turn? (a) they do not turn (b) one up, one down (c) in opposite directions (d) the same direction
3. 3.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
4. 4.⚙️ A small gear drives a big gear. The big gear turns … (a) slower but stronger (b) not at all (c) at the same speed (d) faster and weaker
5. 5.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
6. 6.⚙️ A 30-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
7. 7.⚙️ The gear fixed to the motor is called the … (a) idler gear (b) driven gear (c) driver gear (d) tyre
8. 8.⚙️ A 20-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
9. 9.⚙️ 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
10. 10.True or false: “the output turns slower” happens when a big gear drives a small one. (a) True (b) False
11. 11.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
12. 12.⚙️ A 20-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
13. 13.⚙️ A 10-tooth driver gear turns a 24-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
14. 14.True or false: “the output is weaker” happens when a small gear drives a big one. (a) False (b) True
15. 15.⚙️ A 30-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
16. 16.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
17. 17.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
18. 18.⚙️ A big gear drives a small gear. The small gear turns … (a) slower but stronger (b) not at all (c) at the same speed (d) faster but weaker
19. 19.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 6 turn? (a) anticlockwise (b) clockwise
20. 20.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) False (b) True
21. 21.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
22. 22.⚙️ 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
23. 23.True or false: “the output is stronger” happens when a small gear drives a big one. (a) True (b) False
24. 24.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) True (b) False
25. 25.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
26. 26.⚙️ What are the bumps round the edge of a gear called? (a) teeth (b) pins (c) spokes (d) tyres
27. 27.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) True (b) False
28. 28.True or false: “the output turns faster” happens when a big gear drives a small one. (a) False (b) True
29. 29.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) True (b) False
30. 30.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
31. 31.⚙️ 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
32. 32.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
33. 33.True or false: “the output is weaker” happens when a big gear drives a small one. (a) False (b) True
34. 34.⚙️ A 12-tooth driver gear turns a 15-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
35. 35.⚙️ A 10-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
36. 36.⚙️ 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
37. 37.⚙️ A 24-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
38. 38.⚙️ 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) slower (c) faster
39. 39.⚙️ An 8-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
40. 40.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) False (b) True

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