(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

https://online-s.physics.uiuc.edu/cgi/courses/shell/common/showme.pl?courses/phys211/spring09/homework/09/pivoting_stick/5.gif [Broken]

A stick of uniform density with mass M = 8.7 kg and length L = 0.6 m is pivoted about an axle which is perpendicular to its length and located 0.14 m from one end. Ignore any friction between the stick and the axle.

The stick is held horizontal and then released.

What is its angular acceleration as it passes through the vertical position?

2. Relevant equations

Torque = I*(angular acceleration)

Torque = r X F

3. The attempt at a solution

I need to find the net torque of the system to solve this problem.

But when i draw a free-body diagram, i can't find the tangential force to the stick which should be used in the torque equation.(I find only horizontal forces which make no sense...)

Please help me out here.....

Thanks.

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# Homework Help: Rotational Kinematics - Torque

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