The correct answer is supposed to be B, but the last time I posted I was given t

Question

The correct answer is supposed to be B, but the last time I posted I was given the wrong answer. Please clearly show how to do this, and if you really think it isn't B please let me know

Problems 7-8. A thin rod of length a rotates about its center (denoted by A in the figure below) with angular speed o. Attached to each end of the rod are two small spheres, one of mass M, the other of mass 3M 3M Problem 7. What is the magnitude of the translational angular momentum of this system about point A? A) 0 trans A 4 trans,A1-16 trans,A

Explanation / Answer

let x = distance of center of mass from 3m

3m (x)= m (a-x)

4x=a

x=a/4

so the total angular momentum= 3m (a/4)2w + m (3a/4)2w

L=3/4ma2w

option d is correct.

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