[填空题]
Two billiard balls of eur.8m ,21xct4 exw j;;kwzrqe qu pflya,pb :, irvf-5)pal mass undergo a perfectly elastic head-on collision. If one ball’s initial speed was 2m/s and the other’a5,i ffr)pvpyb p-, l:s was 3m/s in the opposite direction, what will be their speeds after the collision?(Let A represent the ball moving at 2.00 m/s, and call that direction the positive direction.Let B represent the ball moving at 3.00 m/s in the opposite direction. ) v'$_A$ = m/s v'$_B$ = m/s
