[问答题]
A small block of mass n6 4ov3s/*n/r kf5sorc wc/ lnr4ij7jt xt0 r) m is given an initial sp/;hg:ykh4f+by , zbmi eed $ v_{0} $ up a ramp inclined at angle $\theta $ to the horizontal. It travels a distance d up the ramp and comes to rest. Determine a formula for the coefficient of kinetic friction between block and ramp.
