Physics - Rotation Question with Solution | TestHub

A smooth disc of mass M and radius R can rotate freely around a vertical axis supported by frictionless  bearings. A constraining vertical surface of negligible mass, whose shape is a semicircular arc of radius r = R/2, is fixed on the disc as shown in the figure. A small ball of mass m is placed on the stationary disc and is bowled at a speed v in such a way that it reaches the internal side of the constraining surface tangentially. What is speed of the ball when it leaves the disc ?