Chapter 11, Problem 58PCE

A student on a piano stool rotates freely with an angular speed of 2 95 rev/s The student holds a 1.25-kg mass in each outstretched arm 0.759 m from the axis of rotation The combined moment of inertia of the student and the stool, ignoring the two masses is 5.43 kg · m². a value that remains constant (a) As the student pulls his arms inward, his angular speed increases to 3.54 rev/s How far are the masses from the axis of rotation at this time considering the masses to be points? (b) Calculate the initial and final kinetic energies of the system