[填空题]
A hollow cylinder (hoop) is rolling on a horizontae;:y*o n-c sc )rivu8kc .haxsi 8*co5l surface at (loy byvf dog7 ceg6h h)efn(ni(0(1 :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
Post time 2025-2-18 20:00:22
