A uniform wheel o

Given:

Radius of wheel= R

Angular speed=

When it is placed on the rough surface, due to friction of the surface, its acceleration decreases.

We consider the point A where external torque is zero. Using the law of conservation of angular momentum. Before rolling and after rolling, the angular momentum remains constant.

Therefore, angular momentum=

After pure rolling the velocity of the wheel let v

Hence, angular momentum=

=

Equating equation (1) and (2)