A particle rotates in a circular path of radius with varying speed

PHYSICS · Subjective · CBSE · Physics · System of Particles and Rotational Motion · System of Particles and Rotational Motion

Problem

A particle rotates in a circular path of radius

54\,\text{m}

with varying speed

v=4t^2

, where

v

is in

\text{m s}^{-1}

and

t

is in seconds. Find the angle between velocity and acceleration at

t=3\,\text{s}