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Flame SCF 18 Near Chawla Lights Ph-7 Mohali 9888949978

144. A ring of radius 4a is rigidly fixed in vertical position on a table. A small disc of mass m and radius a is released as shown in the fig. When the disc rolls down, without slipping, to the lowest point of the ring, then its speed will be

(a) √ga

(b) √2ga

(c) √3ga

(d) √4ga

Ans. d

5/5 - (1 vote)

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