Two discs are rotating about an axis as shown in the figure. The moment of inertia of the right disc is 2 kg m2 and it rotates with angular speed of 2000 rpm. The

moment of inertia of the left disc is 5 kg m2 and it rotates in the opposite direction

with angular speed of 100 rpm. The discs are suddenly clamped together.

Determine the final common angular speed of the clamped discs.

Review multiple-concept example 7 in this chapter as an aid in solving this problem. in a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. in one instance, the radius of the circle is 0.626 m. at one point on this circle, the ball has an angular acceleration of 66.1 rad/s2 and an angular speed of 12.6 rad/s. (a) find the magnitude of the total acceleration (centripetal plus tangential) of the ball. (b) determine the angle of the total acceleration relative to the radial direction.