# Spring 1

Classical Mechanics Level 3

Block A of mass $$m$$ slides on a smooth slider in the system as shown. Block C of the same mass hanging from a pulley pulls block A. When the block A was ata position B, the spring was unstratched. Find the speed of the block A when $$AB = OB = L$$.

Options:

1. $$\sqrt{ \dfrac{gL}{\sqrt2} - \dfrac{KL^2\sqrt2}m }$$
2. $$\sqrt{ gL - \dfrac{KL^2 (\sqrt2- 1)^2}{2m}}$$
3. $$\sqrt{gL - \dfrac{2LK^2 (\sqrt2 - 1)^2}m }$$
4. $$\sqrt{ \dfrac{gL}2 - \dfrac{KL^2\sqrt2}m }$$
×