A $1\mathrm{.}5$ kg block is held at rest near the top of a rough incline that makes an angle of $37$ from the horizontal. The block is then released and starts moving with a constant acceleration. When the block travels $2\mathrm{.}0$ m $,$ its velocity is $4\mathrm{.}0\frac{m}{s}.$ The coefficient of kinetic friction between the surface of the incline and the block is most nearly

$0\mathrm{.}25$

$0\mathrm{.}40$

$0\mathrm{.}75$