A) \[\frac{1}{2\pi }\sqrt{\frac{g}{l}}\]
B) \[\frac{1}{2\pi }\sqrt{\frac{g}{3l}}\]
C) \[\frac{1}{2\pi }\sqrt{\frac{2g}{3l}}\]
D) \[\frac{1}{2\pi }\sqrt{\frac{3g}{2l}}\]
Correct Answer: D
Solution :
The equation of motion is (figure) \[\frac{m{{l}^{2}}}{3}\,\ddot{\theta }\,\left( \frac{mgl}{2} \right)\,\theta =0\] \[\ddot{\theta }+\frac{3}{2}\,\frac{g}{l}\theta =0\] \[{{f}_{n}}=\frac{1}{2\pi }\,\sqrt{\frac{3g}{2l}}\]You need to login to perform this action.
You will be redirected in
3 sec