Energy Conservation With Nonconservative Forces: A $30-$N stone is dropped from a height of $10$ m and strikes the grount with a spe friction acted on the stone as it fell?$7\mathrm{.}2$ N$2\mathrm{.}9$ N$0\mathrm{.}13$ kN$4\mathrm{.}1$ N$1\mathrm{.}2$ N