Question

Define centripetal acceleration derive an expression for it

Answer 1

Hyyy dear

Centripetal acceleration is the rate of change of tangential velocity: Consider an object moving in a circle of radius r with constant angular velocity. The tangential speed is constant, but the direction of the tangential velocity vector changes as the object rotates.

Expression for the centripetal acceleration of a particle moving with uniform speed 'v' along a circular path of radius 'r'.
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