Question

a child walks towards a fixed plane mirror at a speed of 5 kmh-1. the velocity of the image with respect to mirror is _
a.5 kmh-1
b.-5kmh-1
c.10kmh-1
d.-10kmh-1​

Answer 1

Answer:

The velocity of the image with respect to mirror is -5 km/hr

Explanation:

The velocity of the image will have the same magnitude as that of the velocity of the child. The velocity of the image will have a negative sign to indicate that the image is moving in a direction opposite to that of the child.

Velocity of image = -5 km/hr

The image will be moving with a velocity of – 5 km /hr towards the mirror.

Answer 2

Answer:

The correct answer is option B

Explanation:

Given,

Object velocity = 5 km/h-1

We know for plane mirror,

Image velocity w.r.t mirror = - (object velocity w.r.t to mirror)

Thus,

Image velocity = −5 km/h−1

Negative sign indicates that image will be moving left (or toward the mirror).