A Turntable Has a Moment of Inertia of 3

Multiple Choice

A turntable has a moment of inertia of 3.0 x 10^-2 kg*m² and spins freely on a frictionless bearing at 25 rev/min.A 0.30-kg ball of putty is dropped vertically on the turntable and sticks at a point 0.10 m from the center.By what factor does the kinetic energy of the system change after the putty is dropped onto the turntable?

A) 0.91
B) 1.0
C) 0.82
D) 1.5