Question

A uniform rod of length l is free to rotate in a vertical plane about a fixed horizontal axis through B. The rod begins rotating from rest from its unstable equilibrium position. When, it has turned through an angle 8, its angular velocity ω is given by

• A. $\sqrt {(\frac {6g}{l})}\ sin \frac θ2$
• B. $\sqrt {(\frac {6g}{l})}\ cos \frac θ2$
• C. $\sqrt {(\frac {6g}{l})}\ sinθ$
• D. $\sqrt {(\frac {6g}{l})}\ cosθ$

Answer 1

Answer: (A)

$\sqrt {(\frac {6g}{l})}\ sin \frac θ2$

Answer 2

The correct option is (A): $\sqrt {(\frac {6g}{l})}\ sin \frac θ2$.