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A car moves on a circular path such that its speed is
\( \mathrm{P} \) given by \( v=K t \), where \( K= \) constant and \( t \) is time, the radius of circular path is \( r \), then net acceleration of the
W car at time \( t \) is
(1) \( \sqrt{K^{2}+\left(\frac{K^{2} t^{2}}{r}\right)^{2}} \)
(2) \( 2 K \)
(3) \( K \)
(4) \( \sqrt{K^{2}+K^{2} t^{2}} \)
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