Introductory Moment of Inertia and Rotational Kinetic Energy Problem

Three 20.0-gram masses are 9.4 cm from an axis of rotation and rotating at 152 revolutions per minute. What is the moment of inertia of the three-object system? The strings holding the masses are of negligible mass. Rotational Kinetic Energy is also solved for and correct units are determined. Want Lecture Notes? https://www.flippingphysics.com/momen... This is an AP Physics 1 topic.

0:00 Demonstration
0:14 Translating the problem
0:57 Solving the problem
2:40 Moment of Inertia and angular velocity
3:35 Rotational Kinetic Energy
4:04 Fixing the units
6:27 Solving for joules
7:17 Comparing to Gravitational Potential Energy

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