Relative Velocity
This is the velocity of an object relative to some other object which might be stationary , moving slowly , moving with same velocity , moving with higher velocity or moving in opposite direction .
If initial position of two objects A and B are xA ( 0 ) and xB ( 0 ), the position at time t will be ,
xA ( t ) = xA ( 0 ) + vA t
xB ( t ) = xB ( 0 ) + vB t Displacement from object A to B , [ xB ( 0 ) - xA ( 0 ) ] + ( vB -vA) t Velocity of B relative to A = vBA = vB – vA Velocity of A relative to B = vAB = vA – vB o o o o o