MCQ
Velocity of sound is maximum in
- AAir
- BWater
- CVacuum
- ✓Steel
In vacuum sound cannot travel, it's speed is zero.
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$[A]$ The midpoint of the bar will fall vertically downward
$[B]$ The trajectory of the point $\mathrm{A}$ is a parabola
$[C]$ Instantaneous torque about the point in contact with the floor is proportional to $\sin \theta$
$[D]$ When the bar makes an angle $\theta$ with the vertical, the displacement of its midpoint from the initial position is proportional to $(1-\cos \theta)$
