Question

If the body A has a momentum is 20 kg.m/s, and the body B has a mass of 2.5 kg and having the same momentum as of the body A.
Find the velocity of the body B?

Answer 1

Given data
Body A has a momentum is $p_a=20\mathrm{kg}.m/s$
Mass of the body B is $m_b=2.5\mathrm{kg}$

From the given data, the momentum of the body B is having the same momentum as the body A.
$p_a=p_b$

The formula for the velocity of the body B is given as

$p_b=m_b{v}_b{v}_b=\frac{p_b}{m_b}$
Substitute the known values in the above expression as

$v_b=\frac{20}{2.5}=8m/s$
Hence, the velocity of the body B is $v_b=8m/s$