A ring (mass 2 M, radius 1 R) rotates in a CCW direction with an initial angular

Question

A ring (mass 2 M, radius 1 R) rotates in a CCW direction with an initial angular speed 2 . A disk (mass 4 M, radius 1 R) rotates in a CW direction with initial angular speed 4 . The ring and disk "collide" and eventually rotate together. Assume that positive angular momentum and angular velocity values correspond to rotation in the CCW direction. What is the initial angular momentum Lj of the ring+disk system? Write your answer in terms of MR2o -4 MR2 Computer's answer now shown above. You are correct. Your receipt no. is 163-2134 Previous Tries what is the final angular velocity ur of the ring-disk system? write your answer in terms of Submit Answer Tries 0/3

Explanation / Answer

b] final angular velocity = angular momentum/ momet of inertia

= [ -4MR^2w]/[2MR^2 + 0.5*4MR^2].....since final and initial angular momentum are same

= -w or -1 w answer

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