Questions
A uniform metallic rod rotates about its perpendicular bisector with constant angular speed. If it is heated
uniformly to raise its temperature slightly, then [AIIMS 2015]
detailed solution
Correct option is B
When a metallic rod is heated, it expands. Its moment of inertia (I) about a perpendicular bisector increases. According to law of conservation of angular momentum, its angular speed (co) decreases, since ω∝1ITalk to our academic expert!
Similar Questions
A disc rotates freely with rotational kinetic energy E about a normal axis through centre. A ring having the same radius but double the mass of disc is now, gently placed on the disc. The new rotational kinetic energy of the system would be
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