[填空题]
A ski starts from rer2iqp e .zhxc9fhi4 :n8ufe. /st and slides down a 22 rh zo:*f)y :zavts+n;$^{\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
