20.  Billiard ball A moving with speed 3m/s in the +x direct…

20.  Billiard ball A moving with speed 3m/s in the +x direction as in fig. strikes an equal-mass ball B initially at rest. The two balls are observed to move off at 450 to the x axis, ball A above the x axis and ball B below. That is,ϴ’A =450 and ϴ’B =-450 in Fig. What are the speeds of the two balls after the collision?