?The $0\mathrm{.}16$ ?kg particle has a speed v $=11\mathrm{.}9$ ?m$/$s as it passes the position shown. The coefficient of kinetic friction between the particle and the vertical$-$plane track is $\mu$k $=0\mathrm{.}24.$ ?Determine the magnitude of the total force exerted by the track on the particle. What is the change in speed v $($positive if speeds up$,$ ?negative is slows down$)$ ?of the particle?

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38 p = 5.1 m 38 p = 5.1 m