13.42: An object of mass 12M is at rest whe
(np1p,;. wt rc* s,vsfk;fhhun it suddenly explodes into 3 pieces wi
fu s 1.,,*k;n pw(shr vtcpfh;th masses 3M, 4M and 5M. The piece of mass 3M moves with speed V in the direction shown in the diagram. What is the speed of the piece with mass 5M knowing that it is moving directly to the right?