Relative velocities (parallel direction)


The relative velocity (v_A|B) is the velocity of an object or observer B in the rest frame of another object or observer A.

In the case where two objects are traveling in parallel directions, the relative speed is given by the shown formula

Related formulas


vBArelative speed (m/s)
vBspeed of object B (m/s)
vAspeed of object A (m/s)
cspeed of sound (m/s)