[填空题]
A ski starts from rest and slides wv4,ygvz2ta q +lv j.u,vwdjq0qa.96do+ jy wrf) ia0,mct;n-awn a 22 $^{\circ} $ incline 75 m long.
(a) If the coefficient of friction is 0.090, what is the ski’s speed at the base of the incline? $\approx$ m/s
(b) If the snow is level at the foot of the incline and has the same coefficient of friction, how far will the ski travel along the level? Use energy methods.$\approx$ m
