A rod of mass M=101g and length L=31cm can rotate about a hinge at its left end and is initially at rest. A putty ball of mass m=11g, moving with speed V=6m/s, strikes the rod at angle theta=21 degrees a distance D=L/3 from the end and sticks to the rod after the collision. Calculate the rotational kinetic energy, in joules, of the system after the collision

A rod of mass M=101g and length L=31cm can rotate about a hinge at its left end and is initially at rest. A putty ball of mass m=11g, moving with speed V=6m/s, strikes the rod at angle theta=21 degrees a distance D=L/3 from the end and sticks to the rod after the collision. Calculate the rotational kinetic energy, in joules, of the system after the collision