[填空题]
A 0.450-kg ice puck, mov+zztcso *lsfo.l ,n4 )nr21kving east with a speed of 3m/sr/*rjm1 z+ysk has a head-on collision with a 0.900-kg rrs 1m y/kz*j+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 the 0.900-kg puck. v'$_A$ = m/s v'$_B$ = m/s