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A ring rolls without slipping on the ground. Its centre C moves with a constant speed u. P is any point on the ring. The speed of P with respect to the ground is V. 1) $0 \leq v \leq 2u$ 2) $v=u $, if CP horizontal 3) $v=u$ if CP makes an angle of $60^{\circ}$ with the horizontal and p is below the horizontal level of C 4) $v= \sqrt 2 u$ if CP is horizontal Which of the following is correct?

a) 1,2 and 3 b) 2,3 and 4 c) 1,3 and 4 d) 1,2 and 4

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