A person approaches a plane mirror at a speed of 3 m/s. How fast does he approach his image?
A) 3 m/s
B) 4 m/s
C) 5 m/s
D) 6 m/s
E) 7 m/s

Question

Quizplus · Accepted Answer

The image in a plane mirror appears to be the same distance behind the mirror as the object is in front. As the person moves towards the mirror at 3 m/s, the image moves towards the person at the same speed, effectively doubling the rate at which they approach each other, resulting in a relative speed of 6 m/s.

A Person Approaches a Plane Mirror at a Speed of 3