A spool, initially at rest, is kept on a frictionless fixed inclined plane, making an angle $\mathrm{\theta }={37}^{\circ }$ with the horizontal. The mass of the spool is 2kg and it is pulled by a string as shown with a force of $\mathrm{T}=10\mathrm{N}$. 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 m/ s².