A body with mass 5 kg


A body with mass 5 kg is acted upon by a force

$F=(-3 \hat{i}+4 \hat{j})$ N. If its initial velocity at $\mathrm{t}=0$ is

$v=(6 \hat{i}-12 \hat{j}) \mathrm{m} / \mathrm{s}$, the time at which it will just have a velocity along the $\mathrm{y}$-axis is

(a) never

(b) 10 s

(c) 2 s

(d) 15 s


The correct answer is (b) 10 s

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