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Question: a ring of mass m can slide along a fixed...

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A ring of mass m can slide along a fixed rough vertical rod as shown. The ring is connected by a spring of constant K R where 2R is the natural length of spring. The other end of spring is fixed to the ground at point A at a horizontal distance of 2R from the base of the rod. 3R If the ring is released from a height of 2and it reaches the ground with a speed of 3gR The coefficient friction between the rod and ring is; 3R/2 2R A) 413-n2 ] B 413-2n2 )3-4n2] D) 2
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