1.

A point object is placed infront of a plane mirror as shown in figure. X_(OM) rArr x - co-ordinate of object relative to mirrorX_(IM) rArr x -x-co-ordinate of image relative to mirrorX_(IM) = -X_(OM)differentiating V_(IM) = 0-V_(OM)V_I - V_M = - (V_0 - V_M) Velocity if image relative to mirror = velocity of object relative to mirror. basing on this information answer the questions The reflection surface of a plane mirror is vertical. A particle is projected in a vertical plane which is also perpendicular to the mirror. The initial velocity of the particle is 10 m/s and the angle of projection is 60^@. The point of projection is at a distance 5 m from the mirror. The particle moves towards the mirror. Just before the particle touches the mirror, the magnitude of relative velocity of approach of the particle and its image is

Answer»

10m/s
5m/s
10sqrt3` m/s
`5SQRT3`m/s

Answer :A


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