engineering recuitment BEL Probationary Engineers Mock Test 2025 Mechanical Vibrations Undamped Free Vibration Vibration of Beam and Pendulum
बड़े दोलन के लिए एक सरल लोलक के गति का समीकरण क्या होगा?
1
\(\ddot\theta + \frac{g}{l}\sin \theta = 0\)
2
\(\ddot\theta + \frac{mg}{l}\sin \theta = 0\)
3
\(\ddot\theta + \frac{mg}{l} \theta = 0\)
4
\(\ddot\theta + \frac{g}{l} \theta = 0\)