Which of the following statements about friction it NOT correct?
A. the force of kinetic friction is less thanthe force of static frictlon B. the force of kinetlc friction between two surface is Independent of the areas in contact provided the normal reactlon is unchanged C. the force of sliding friction between two surface is less than the force. of sliding friction D. the angle of friction is the angle between the normal reaction and the force friction E. friction may be reduced by lubrication
