Physics

Problem

A particle initially at rest moves along x-axis. It is subjected to an acceleration which varies with time according to the equation:

a = 2t + 5

. Its velocity after 2 second will be (A)

9 \text{ m s}^{-1}

(B)

12 \text{ m s}^{-1}

(C)

14 \text{ m s}^{-1}

(D)

18 \text{ m s}^{-1}