# Rotational Kinetic energy and Rotational Inertia

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### Document Description

This document contains a practice question that includes finding the rotational inertia and applying the conservation of rotational energy concept in order to get to the answer. I think it will be very helpful for students interested in that subject .

## Written By

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The total rotational inertia of the three rods is :I = I1 + I2 + I3=0++ mL2 =mL2The center of mass is located in the middle of rod2 , hencexcm = L/2So when the plane of the H is vertical , the center of mass will be falling a distance of L/2.From conservation of energy :PE (top) = KE (bottom)3mg(L / 2) = (1/2) I 2Hence I 2 = 3mgLSo(mL2 ) 2 = 3mgLHence2 =So=rad/sName: Rotational Kinetic energy and Rotational Inertia Description:This document contains a practice questio

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