13.42: An object of mass 12M is a
mb 70bu+t4yi v 2mxwwqt,o56 pnb/rjw.b r,/ ft rest when it suddenly explodes into 3 pieces with masses 3M, 4M and 5M. The piece of mass 3M moves
/, bfb 4nr67+x bbyw,p2 .0vq5rmt/mwjo tuiwwith 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?