Physics

Problem

Which expression gives the velocity of object A relative to object B, denoted

v_{A/B}

, if

v_A

and

v_B

are the respective velocities of A and B measured along the same straight line with respect to an inertial ground frame? a)

v_{A/B}=v_A-v_B

v_{A/B}=v_B-v_A

v_{A/B}=v_A+v_B

v_{A/B}=\dfrac{v_A+v_B}{2}