[填空题]
A hollow cylinder (hcoec8akz8 h:vh: q/w*b 1ptc0c9 6oycoop) is rolling on sl)7takz7*qljok-,7 y cfxu- 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