The projectile motion of a particle of mass 5g is shown in the...

$| \overset{→}{u} | = | \overset{→}{v} |$

\overset{→}{u} = ucos45\overset{^}{i} + usin45\overset{^}{j}

\overset{→}{v} = vcos45\overset{^}{i} - vsin45\overset{^}{j}

$| \overset{→}{\Delta P} | = \left|m\left(\overset{→}{v} - \overset{→}{u}\right)\right|$

$\Delta P = 2musin45 °= 2 \times 5 \times {10}^{- 3} \times 5\sqrt{2} \times \dfrac{1}{2}$

$\Delta P = 50 \times {10}^{- 3}= 5 \times {10}^{- 2}$.