3/178 The rigid assembly which consists of light rods and two 1.2‐kg spheres rotates freely about a vertical axis. The assembly is initially at rest and then a constant couple M = 2 N · m is applied for 5 s. Determine the final angular velocity of the assembly. Treat the small spheres as particles]

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.