Rotational Inertia of Point Masses
Three point masses are arranged in the xy-plane: a mass of 2m is at (0, 0), a mass of m is at (L, 0), and a mass of 3m is at (0, L). What is the rotational inertia of this system about the z-axis passing through the origin?
A
4mL²
B
6mL²
C
3mL²
D
5mL²
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