[填空题]
A hollow cylinder (hoop)b jttd)tl gnn+d, ;w.) is rolling on a horizontal surface at speed v=3.3 m,wk wbli25-0d /n-le sh cg8he.e/ud $m/s$ 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
