A body, A of mass 1 kg starts moving on a rough horizontal surface AB with initial speed 20m/s.Coefficient of friction between body and the surface is u=0.5.Path AB leads to a ftictionlrdd circular path BC having radius of curvature 2 m subtending at an angle 60 degree at centre. If coefficient of restitution between the body and the horizontal surface CD is 0.5,then find the horizontal distance travelled by the body on CD just before second collision. 
