### What is combination rotational inertia and kinetic energy

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Two particles, each with mass m = 0.84 kg, are fastened to each other, and to a rotation axis at O, by two thin rods, each with length d = 5.6 cm and mass M = 1.4 kg. The combination rotates around the rotation axis with angular speed ω = 0.33 rad/s. Measured about O, what is the combination's (a) rotational inertia and (b) kinetic energy?

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