Question

Two bars of masses $m_1$ and $m_2$, connected by a weightless spring of stiffness $k$, rest on a smooth horizontal plane. Bar $2$ is shifted by a small distance $x_0$ to the left and released. When bar $1$ breaks off the wall, what is the velocity of the centre of mass of the system?

Answer 1

Given, masses $m_1$ and $m_2$

Weightless spring of stiffness$=k$

$v=\frac{m_2-m_1}{m_1+m_2}K$