Question

If an object moves with a speed of 10 $\frac{m}{sec}$ towards a plane mirror. Find out the speed of the image with respect to the mirror?

• A. 10 $\frac{m}{sec}$, away from mirror
• B. 10 $\frac{m}{sec}$, towards the mirror
• C. 2 $\frac{m}{sec}$, away from mirror
• D. 5 $\frac{m}{sec}$, towards the mirror

Answer 1

The correct option is B

10 $\frac{m}{sec}$, towards the mirror

Object distance from the plane mirror is equal to the image distance from the mirror.

Speed (Velocity) is the change in distance over time. $Speed,S=\frac{Distance}{time}$

So, speed of the image is same as that of the object, and the direction is towards the mirror.