[填空题]
A ski starts from rem1m;/pqaj2egz 6rm l6sv(0sl-urzvm5- t8zdlo 4 u)oi t and slides down 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
