$($Problem $8-2)$ Consider a block of mass $45$ kg which is being pulled on a rough horizontal surface by a person using a rope. The rope makes an angle $=35$ with the horizontal. As the result of constant force $T=190N$ applied by the person, the block moves with constant acceleration $a=0\mathrm{.}86\frac{m}{s^2}$ in the direction of the applied force. Determine the coefficient of friction $$ between the block and the surface if the bottom of the block remains in full contact with the ground surface during the motion.