[填空题]
A hollow cylinder (hoop) is rolling on a horizontal surface at speemk,dwvrn:,i : d v=3xpa *1;jsj w9g.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
