Question

Two elastic bodies P and Q having equal masses are moving along the same line with velocities of 16 m/s and 10m/s respectively. Their velocities after the elastic collision will be in m/s :

• A. 0 and 25
• B. 5 and 20
• C. 10 and 16
• D. 20 and 5

Answer 1

The correct option is C 10 and 16

Let velocities be $v_1$ and $v_2$
conservation of momentum.
$m(16+10)=m{v}_1+m{v}_2$
$\Rightarrow v_1+v_2=26$
$e=1$.
$16-10=v_2-v_1$
The velocities are $10m/s$ and $16m/s$