Question

A body of mass $1kg$ is traveling with a velocity of $3m/s$ accelerates uniformly with $8m/s^2$ to travel for $2s$. Find its final momentum in $Ns$?

• A. $19Ns$
• B. $6Ns$
• C. $12Ns$
• D. $20Ns$

Answer 1

The correct option is A $19Ns$

Momentum, $p=m\times v$

Using equation of motion for relating $u$ and $v$
$v=u+at$
$v=3+(8\times 2)=19m/s$
Final momentum, $p=mv=1\times 19=19Ns$