Question

Two bodies are moving in opposite direction with
velocity 10m/s. What is the magnitude of their
relative velocity ?
(A) zero
(B) 10 m/s
(C) 5 m/s (D) 20 m/s​

Answer 1

Answer: D} 20 m/s

Explanation:

Relative velocity is the velocity of an object as observed from a particular reference frame, and it varies dramatically with reference frame.

Thus, in order to find magnitude of their relative velocity we have to add the two given velocities.