Question

if a person running towards a plane mirror with speed 15m/s, then speed of his image will be

Answer 1

the speed of images are same as that of objects

Answer 2

Hello,
The velocity component of the image parallel to the plane of the mirror will be the opposite of the object, while any component of the velocity of the object parallel to the plane of the image will be have the same value.

so in our case,the speed of his image will be 15 m/s.

Bye :-)