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Asked in NEET 2024 · Relation between linear and angular motion
Idea: uniform speed means the magnitude of ⃗v is fixed; it says nothing about direction.
On a circle the velocity is tangential, so its direction changes from point to point: ⃗v varies.
The acceleration is centripetal, of magnitude (v²)/r directed at the centre, so its direction changes too: ⃗a varies.
Both the velocity and the acceleration therefore vary.
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