Question

What is relative velocity in one dimension, if V_A and V_B are the velocities of the body A and B respectively then prove that V_AB=V_A-V_B?

Answer 1

Relative Motion:- The rate of change of separation between the two object is called relative velocity. The relative velocity of an object B with respect to the object A when both are in motion is the rate of change of position of object B with respect to the object A .

*Relative velocity of object A with respect to object B 

V_AB = V_A - V_B

When both objects are moving in same direction , then the relative velocity of object B with respect to the object A 

V_BA = V_B - V_A