A man runs towards mirror at a speed of 15m/s . The speed of image with respect to man is
Answers
= 15 m/s - (-15 m/s)
= 30 m/s
It depends on the mirror.
If the mirror is perfectly flat, then the answer is simple.
The VELOCITY component of the image parallel orthogonal to the plane of the mirror will be the reverse of the object, while any component of the velocity of the object parallel to the plane of the image will have the same value.
That is then, if the object is approaching the mirror on an exactly orthogonal path, the image will have a velocity of the same magnitude, but in the opposite direction.
Should the mirror be curved, then a whole can of worms has been opened.
If the mirror is parabolic, and the object moves through the focus, then the velocity of the image, when the object is at the focus, will exceed the speed of light, no matter how slowly the object moves.