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Sahay Sir > Question Answers > Cengage NEET by C.P Singh > Part 1 > Chapter 11 - Rotational Motion > Two discs of moment of inertia I1 and I2 and angular speeds ω1 and ω2 are rotating along the collinear axes passing through their center of mass and perpendicular to their plane. If the two are made to rotate combindly along the same axis the rotational K.E. of system will be

Two discs of moment of inertia I1 and I2 and angular speeds ω1 and ω2 are rotating along the collinear axes passing through their center of mass and perpendicular to their plane. If the two are made to rotate combindly along the same axis the rotational K.E. of system will be

A solid sphere is rotating about a diameter at an angular velocity ω. If it cools so that its radius reduces to I/n of its original value its angular velocity becomes