Asystem consists of a disk of mass 2.87 kg and radius 50 cm upon which is mounted an annular cylinder of mass 2.03 kg with inner radius 20 cm and outer radius 30 cm (see below). the system rotates about an axis through the center of the disk and annular cylinder at 18.6 rev/s. what is the systems rotational kinetic energy?

Rank the six combinations of electric charges on the basis of the electric force acting on q1. define forces pointing to the right as positive and forces pointing to the left as negative. rank positive forces as larger than negative forces. q1,q2,q3 = positive(+) q1 = + q2 = + q3 = - q1 = + q2= - q3= + q1= - q2= + q3= + q1= + q2= - q3= - q1,q2,q3 = negative