Question

an object is moving with a speed of 2 metre per second towards a mirror .With what speed will the image and the object come closest each other?????

Answer 1

x’ = -x, where x is position of observer and x’ is position of the image.

With mirror at 0.

So, if dx/dt = 2 m/s, dx’/dt = -dx/dt = - 2m/s.

using the classical formula for relative speed,

Vrel = dx’/dt - dx/dt = -2dx/dt = -4 m/s.

So, the image is approaching the observer at 4 m/s.

Answer 2

02 Meter per second because the image will move in the speed of the object