[填空题]
A block of mass m=2.2kg slides dujo q:.hk5t8o ow+6p 8vpxgc*fb n a 30.0 $^{\circ} $ incline which is 3.60 m high. At the bottom, it strikes a block of mass M=7kg which is at rest on a horizontal surface, Fig. 7–46. (Assume a smooth transition at the bottom of the incline.) If the collision is elastic, and friction can be ignored, determine
(a) the speeds of the two blocks after the collision,v'$_A$ = m/s v'$_B$ = m/s
(b) how far back up the incline the smaller mass will go. $\approx$ (Round to the nearest integer) (Let A represent mass m, and B represent mass M.)
