question_answer

A man runs towards a mirror at a speed 15 m/s  The speed of the image relative to the man is [Kerala PET 2002]

A)            15 \[m{{s}^{-1}}\]              

B)            30\[m{{s}^{-1}}\]

C)            35 \[m{{s}^{-1}}\]              

D)            20\[m{{s}^{-1}}\]

Correct Answer: B

Solution :

                   Relative velocity of image \[w.r.t.\] man                    \[=15-(-15)=30\ m/s\]