# Give me ID Card-2!

**Classical Mechanics**Level 5

Two masses \(m\) and \( M\) are attached at the midpoint \(O\) of \(AB\) and at point \(C\), respectively. If \(m\) is released, \(m\) & \(M\) cross each other at any point \( P\) as shown in the figure. Find the **minimum** value of \(\dfrac {m}{M}\) so that they cross each other.