A sled plus passenger with total mass m$=60\mathrm{.}2$kg$,$ is pushed a distance d$=21\mathrm{.}3$m across a horizontal, snow$-$packed surface for which the coefficient of kinetic friction with the sled is k$=0\mathrm{.}239.$ The pushing force is constant and makes an angle of $=24\mathrm{.}6$ degrees below horizontal. The sled moves with constant velocity.