11.A DISC IN WHICH SEVERAL GROOVES ARE CUT ALONG THE CHORD DRAWN FROM A POINT A, IS ARRANGED IN A VERTICLE PLANE , SEVERAL PARTICLES START SLIPPING FROM A ALONG GROOVES SIMULTANEOUSLY . ASSUMING FRICTION AND RESISTANCE NEGLIGIBLE ,THE TIME TAKEN IN REACHING EDGE OF DISC WILL BE 1.MAXIMUM IN GROOVE AB 2.MAXIMUM IN GROOVE AD 3.SAME IN ALL GROOVES 4.ACCORDING TO HEIGHT OF B, C, D, E, F

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