Question

Two bodies move toward each other from 10 m apart with a constant velocity they meet at C after 2s. What is the relative velocity of A w.r.t. B?

• A. 5 m/s
• B. 1 m/s
• C. -1 m/s
• D. -5 m/s

Answer 1

The correct option is A 5 m/s

$U_{AB}=U_A-U_B$
$U_A=\frac{4}{2}=2m/s$
$U_B=\frac{-6}{2}=-3m/s$
$U_{AB}=2-(-3)$
=5 m/s