(adsbygoogle = window.adsbygoogle || []).push({}); [SOLVED] Rod...and angular acceleration

1. The problem statement, all variables and given/known data

A uniform rod AB, of length 2a and mass m, has a particle of mass 1

2m attached to B. The rod is

smoothly hinged at A to a fixed point and can rotate without resistance in a vertical plane. It is released

from rest with AB horizontal. Find, in terms of a and g, the angular acceleration of the rod when it

has rotated through an angle of [itex]\frac{\pi}{3}[/itex]

2. Relevant equations

3. The attempt at a solution

My idea is that the torque due to the weight and the mass is the net torque and that should be the same as [itex]I \alpha[/itex] where I=moment of inertia of the entire thing.

I got [itex]I=\frac{10ma^2}{3}[/itex] but I don't know how to incorporate that angle it is rotated through.

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# Homework Help: Rod and angular acceleration

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