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A particle of mass `5kg` is moving on rough fixed inclined plane with constant velocity of `5m//s` as shown in the figure. Find the friction force acting on a body by plane. A. 25 NB. 20 NC. 30 ND. none of these

Answer» Correct Answer - A
`f_(k)=mu_(k)N=mu_(k)mg cos 30_(0)=mg sin 30_(0)=5(10) ((1)/(2)) rArr f_(k)=25N`


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