Question

Two objects A and B are moving towards each other with velocities 10 m/s and 12 m/s respectively as shown. Find the velocity of B with respect to A.

• A. $-22m/s$
• B. $22m/s$
• C. $-40m/s$
• D. $17m/s$

Answer 1

The correct option is A $-22m/s$

Answer is A.
Velocity of A, B and the difference in the velocities are given as follows.
$v_A=+10m/s{v}_B=-12m/s{v}_{BA}=v_B-v_A=-22m/s$
Hence, the velocity of B with respect to A is -22 m/s.