A book resting on a sheet of ice is given an initial speed vi in the +x-direction. The coefficient of kinetic friction between the ice and the book is ?k. (a)Write an expression for the acceleration of the book as it slides across the sheet of ice. (Use the following as necessary: ?k and g. Indicate the direction with the sign of your answer.) ax = (b)Use your result to write an expression for the distance d the book slides, using vi, ?k, and g only. d=

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Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.