[填空题]
A carton is given an lzr -42kdp5 yfy,uvxp+vz*/ lay5 5fh;2y:zo g p:il.g iek 8mz2fh-m initial speed of 3.0 $\mathrm{~m} / \mathrm{s}$ up the 22.0$^{\circ}$ plane shown in Fig. 4-55.
(a) How far up the plane will it go?
(b) How much time elapses before it returns to its starting point? Ignore friction.
