1.

A body slipping on a rough horizontal plane moves witha deceleration of 4.0 m/s. What is the coefficient ofkinetic friction between the block and the plane?.

Answer»

The friction force causing the deceleration = f = m.a

Where m = mass of the body,

and a = deceleration of the body = 4.0 m/s²

So f = 4m N

Normal force on the body = weight of the body = mg N

So coefficient of kinetic friction = 4m/mg =4/g = 4/9.8= 0.4



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