[填空题]
The carton shown in Fig. 4-55 liex:t) m4sbc:ikpwn/ .r s on a plane z3zp1 it,zv(igo4ol4tilted 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?
