A roller coaster $(450$kg$)$ moves from A $(9\mathrm{.}49$ m above the ground$)$ to B $(24\mathrm{.}9$m above the ground$).$ two non$-$conservative forces are present: friction does $-2\mathrm{.}55$ x $10^4$ J of work on the car, and a chain mechanism does $=5\mathrm{.}58$ x $10^4$ J of work to help the car up a long climb. what is the change in the cars kinetic energy KEf $-$ KEo from A to B