Find what is the resulting angular speed of the platform

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A man stands on a platform that is rotating (without friction) withan angular speed of 1.18 rev/s; his arms are outstretched and heholds a brick in each hand. The rotational inertia of the systemconsisting of the man, bricks, and platform about the central axisis 7.28 kg·m2. If by moving the bricks the mandecreases the rotational inertia of the system to 2.70kg·m2,

(a) what is the resulting angular speed of the platform and

(b) what is theratio of the new kinetic energy of the system to the originalkinetic energy?

Reference no: EM13649406

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