Question

The reflecting surface of a plane mirror is vertical. A particle is a project in a vertical plane also perpendicular to the mirror .the initial speed of the particle is 10m/s and the angle of project ${60}^0$ from the normal of the mirror. the point of projection is at a distance 5m from particle moves towards the mirror. just before the particle touches the mirror. the velocity of approving of the particle and the image is:

• A. 12 m/s
• B. 5 m/s
• C. 10 m/s
• D. $5\sqrt{5m/s}$

Answer 1

The correct option is C 10 m/s

In given figure,

$\therefore V_{app}=5+5=10m/s$

$\therefore$ Option $C$ is correct.