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[" A coin is placed on the horizontal su...

[" A coin is placed on the horizontal surface of a "],[" rotating disc.The distance of the coin from the "],[" axis is "1m" and coefficient of friction is "0.5." If the "],[" disc starts from rest and is given an angular "],[" acceleration "(1)/(sqrt(2))" rad "/sec^(2)" ,the number of "],[" revolutions through which the disc turns before "],[" the coin slips is "],[[" (1) "(4)/(pi)," (2) "(7)/(4 pi)," (3) "(5)/(4 pi)," (4) "(3)/(4 pi)]]

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