13.42: An object of mass
nxir we yf 9qlwv5;-/4d;*nke3)zv lr 12M is at rest when it suddenly explodes into 3 pieces wit
w ) xr9e/e; qi*fnly;kwd 4 3vvzr-5nlh 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?