A block sliding down on a rough 45^(@) inclined plane has half the velocity it would have been, the inclined plane is smooth. The coefficient of sliding friction between the block and the inclined plane is

A block sliding down on a rough 45^(@) inclined plane has half the vel

1.	A block sliding down on a rough 45^(@) inclined plane has half the velocity it would have been, the inclined plane is smooth. The coefficient of sliding friction between the block and the inclined plane is
Answer» `(1)/(4)` `(3)/(4)` `(1)/(2sqrt2)` `(1)/(sqrt2)` Solution :`v^(2)-u^(2)=2AS` `V_(R )=sqrt(2gl(sin theta-mu_(K)cos theta)), V_(S)=sqrt(2gl sin theta)`