APFIVE Rotational Inertia of a Pentagon
Five identical point masses are arranged in a regular pentagon with side length $$s$$. What is the ratio of the rotational inertia about an axis through one vertex perpendicular to the plane ($$I_1$$) to the rotational inertia about an axis through the center perpendicular to the plane ($$I_2$$)?
A
$$I_1/I_2 = 0.8$$
B
$$I_1/I_2 = 2$$
C
$$I_1/I_2 = 1$$
D
$$I_1/I_2 = 1.25$$
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