Question

A simple pendulum is suspended to roof of a car. The car is moved with uniform velocity ${}^{\prime }{v}^{\prime }$. If the string makes an angle ${}^{\prime }{\theta }^{\prime }$ with vertical, ${}^{\prime }{\theta }^{\prime }$ will be equal to :

• A. $\frac{v}{g}$
• B. $\frac{v^2}{g}$
• C. $vg$
• D. $\text{Zero}$

Answer 1

The correct option is D $\text{Zero}$

We know that
$\tan \theta =\frac{a}{g}$
Here $a=0$, because velocity is constant.
$\Rightarrow \tan \theta =0$
$\Rightarrow \theta =0$