Three objects lie in the x, y plane. each rotates about the z axis with an angular speed of 5.58 rad/s. the mass m of each object and its perpendicular distance r from the z axis are as follows: (1) m1 = 5.46 kg and r1 = 1.98 m, (2) m2 = 3.64 kg and r2 = 16.50 m, (3) m3 = 3.21 kg and r3 = 3.09 m.

(a) find the tangential speed of each object.
(b) determine the total kinetic energy of this system using the expression ke =