2 kg દળનો પદાર્થ 10 m/s વેગથી પૂર્વ દિશામા

Initial momentum = $\vec P = mv\hat i + mv\hat j$
$|\vec P| = \sqrt 2 mv$
Final momentum = $2m \times V$
By the law of conservation of momentum
$2m \times V = \sqrt 2 \;mv$==> $V = \frac{v}{{\sqrt 2 }}$
In the problem $v = 10m/s$ (given)
$V = \frac{{10}}{{\sqrt 2 }} = 5\sqrt 2 \;m/s$