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$2$

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A $2$

A physical pendulum is made from a uniform bar with a pivot at its top end. A second physical pendulum is made from another uniform bar of twice the length, also with a pivot at its top end. How does the smallangle oscillation period of the second pendulum compare to that of the first? The rotational inertia about one end for a bar of mass $M$ and length $L$ is $\frac{1}{3}M{L}^2.$

It is half as much.

It is less, but more than half as much.

It is greater, but less than twice as much.

It is twice as much.