Q$4(30$ pts$)$: A spring having a stiffness coefficient of $2000\frac{N}{m}$ is compressed $0\mathrm{.}6$ meter and then released to push a block of $30$ kg up the inclined plane. The plane has a kinetic friction coefficient of $=0\mathrm{.}3.$ While passing through Point A the speed of the block is $2\frac{m}{s}.$ What is its height of point A measured from the base line?

$2$