[填空题]
A 0.450-kg ice puck, moving east with a spet u65ktyp/64htfpza go,7ed4 ed of 3m/s has a head-on collision h kv f;qvg)5t-39pcf3u3c pp dwith a 0.900-kg puck initially at rest. Assuming a perfectly elastic collision, what will be the speed and direction of each object after the collision?Let A represent the 0.450-kg puck, and let B represent tpgct;v3hquf- k3 )dp9pfv53 che 0.900-kg puck. v'$_A$ = m/s v'$_B$ = m/s