(adsbygoogle = window.adsbygoogle || []).push({}); A rigid body is made of three identical thin rods, each with length L=0.60m, fastened together together in the form of a letter H. The body is free to rotate about a horizontal axis that runs along the length of one of the legs of H. The body is allowed to fall from rest from a position in which the plane of the H is horizontal. What is the angular speed of the body when the plane of the H is vertical?

I am quite not sure that can I change g (gravity) to α (Angular acceleration) by using gr = α

For my solution,

α (Angular acceleration) = g/r = 9.81/0.6 = 16.4 rad/s^{2}

θ = 90 radian, as it said fall from plane of the H is horizontal to H is vertical.

ω^{2}= ω_{0}^{2}+2aθ

ω^{2}= 0 + 2(16.4)(90)

Answer is 54.3 rad/s

Am I all correct? I'm quite not sure especially angular acceleration.

Thank you

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# Homework Help: Is my solution correct? About Rotational motion

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