- #1

Another

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Why do they only think of kinetic energy of motion?

Why don't they think of both kinetic of motion and kinetic of rolling energy?

So. i think

## L = \frac{1}{2}mv^2 + \frac{1}{2}I \omega^2##

## L = \frac{1}{2}m(r \omega)^2 + \frac{1}{2}(\frac{1}{2}mr^2) \omega^2##

## L = \frac{3}{4} mr^2 \omega^2##