A spool, initially at rest, is kept on a frictionless incline making an angle $\theta ={37}^{\circ }$ with  the horizontal. The mass of the spool is 2kg and it is pulled by a string as shown with a  force of T = 10N. The string connecting the spool and the pulley is initially horizontal.  Find the initial acceleration of the spool on the incline. Express your answer in ${\text{m/s}}^{\text{2}}$ .