Rotational kinetic energy of rigid systems | AP Physics | Khan Academy

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The rotational kinetic energy of a rigid system is related to the rotational inertia and angular velocity of the rigid system. The total kinetic energy of a rigid system is the sum of its rotational kinetic energy due to its rotation about its center of mass, and its translational kinetic energy due to the linear motion of its center of mass. Rotational kinetic energy is a scalar quantity.

Sections:
00:00 - Which one reaches the ground first?
01:00 - Rotational kinetic energy
05:30 - Work-energy theorem for rotation
08:24 - Graph of torque vs. angular position
09:46 - Revisiting the initial question

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