MCQ
A pendulum has length of 0.4 m and maximum speed 4 m/s. When the length makes an angle 30° with the horizontal, its speed will be ______.
$\left[\sin \frac{\pi}{6}=\cos \frac{\pi}{3}=0.5\right.$ and $\left.g =10 m / s ^2\right]$
$\left[\sin \frac{\pi}{6}=\cos \frac{\pi}{3}=0.5\right.$ and $\left.g =10 m / s ^2\right]$
- A$\sqrt{3} m / s$
- B$2 \sqrt{2} m / s$
- C$2 \sqrt{5} m / s$
- ✓$2 \sqrt{3} m / s$