• Subject:

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• Topic:

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The x and y coordinates of a particle at any time t are given by $x=7t+4{t}^{2}$ and y = 5t, where x and y are in metre and t in seconds. The acceleration of particle at t = 5s is

(1) Zero

(2) 8 m/s2

(3) 20 m/s2

(4) 40 m/s2