At time t = 0, two bodies A and B are at the same point. A moves with constant velocity V and B starts from rest and moves with constant acceleration a. Relative velocity of B with respect to A when the bodies meet each other is

After time t,xA = Distance traversed by A = VtxB = Distance traversed by when the bodies meet, xA = xB Now after time 't' vA = velocity of A = V and vB = velocity of B = 0 + at = 2V VBA  = velocity of B relative to A= vB - vA= 2V-V = V