| Question | Answer |
| Periodic time | The time taken to complete one full cycle or revolution |
| Unit of periodic time | Second |
| Formula relating periodic time & angular velocity | T = 2π/ω |
| Formula relating periodic time & linear velocity | T = 2πr/v |
| Centripetal acceleration | The acceleration of an object travelling in uniform circular motion |
| Direction of centripetal acceleration | Towards the centre of the circle |
| Formula relating centripetal acceleration & angular velocity | a = ω²r |
| Formula relating centripetal acceleration and linear velocity | a = v²/r |
| Examples of centripetal acceleration | A car driving around a curve; A roller coaster moving through a loop; A roulette table |
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