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[" 9.A particle moves on a rough horizon...

[" 9.A particle moves on a rough horizontal ground with some "],[" initial velocity say "v_(0)." If "((3)/(4))^(" th ")" of its kinetic energy is lost "],[" due to friction in time "t_(0)" ,then the coefficient of friction "],[" between the particle and the ground is "],[[" (a) "(v_(0))/(2gt_(0))," (b) "(v_(0))/(4gt_(0))],[" (c) "(3v_(0))/(4gt_(0))," (d) "(v_(0))/(gt_(0))]]

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