$A$ body of mass $5 \,kg$ is moving with a velocity of $\vec{v}=(2 \hat{i}+6 \hat{j}) \,m/s$ at $t=0 \,s$. After time $t=2 \,s$,the velocity of the body is $(10 \hat{i}+6 \hat{j}) \,m/s$. The change in momentum of the body is ......... $kg \cdot m/s$.

  • A
    $40 \hat{i}$
  • B
    $20 \hat{i}$
  • C
    $30 \hat{i}$
  • D
    $(50 \hat{i}+30 \hat{j})$

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