1.

whichThe reflection surface of a plane mirror is vertical. A particle is projected in a vertical planeis also perpendicular to the mirror. The initial velocity of the particle is 10 m/s and the angle ofprojection is 60. The point of projection is at a distance 5 m from the mirror. The particle movestowards the mirror. Just before the particle touches the mirror the velocity of approach of theparticle and its image is:

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