Two small masses of are attached to the ends of a light rod of length

PHYSICS · Single correct · CBSE · Physics · System of Particles and Rotational Motion · System of Particles and Rotational Motion

Problem

Two small masses of 0.20 kg0.20\,\text{kg} are attached to the ends of a light rod of length 0.30 m0.30\,\text{m}. The rod rotates in a horizontal plane about its midpoint; the center of mass of the system remains at rest. If the rotational kinetic energy of the system is 1.1 J1.1\,\text{J}, what is its angular speed? (a) 11 rad/s11\,\text{rad/s} (b) 16 rad/s16\,\text{rad/s} (c) 7.9 rad/s7.9\,\text{rad/s} (d) 22 rad/s22\,\text{rad/s}

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