[填空题]
The carton shown in Fig. 4-55 lies osp(08x* n y.pss)ha bd:egdj0n a pl :pawyyo.d7p79 .ctvm zr1xy3ane tilted at an angle $\theta=22.0^{\circ}$ to the horizontal, with $\mu_{\mathrm{k}}=0.12$ . (a) Determine the acceleration of the carton as it slides down the plane.
(b) If the carton starts from rest 9.30 m up the plane from its base, what will be the carton's speed when it reaches the bottom of the incline?
