[填空题]
A hollow cylinder (hoop) is rihsomy0 wpn37c49y, p olling i,:m mlz6o5jwgf/alta- je6i 9 oc (:wbcb;o(on a horizontal surface at speed v=3.3 $m/s$ when it reaches a 15 $^{\circ} $ incline. (a) How far up the incline will it go? $\approx$ m (round to one decimal place) (b) How long will it be on the incline before it arrives back at the bottom? s