QUESTION $2($work Energy$)$

The figure shows a mass $m$ of $5$ kg $,$ spring and cable system. The light rod $AB$ with length $0\mathrm{.}4$ m is released from rest and being pulied by force $200$ N through a cable. Determine the velocity of the mass when point $B$ is vertically above $A.$ The spring is stretched $0\mathrm{.}2$ m at initial position and spring stiffness is $120\frac{N}{m}$

$6$ marks

SOLUTIONS