A body is revolving with a uniform speed $v$ in a circle of radius $r$. The tangential acceleration is
$\frac{v}{r}$
$\frac{{{v^2}}}{r}$
Zero
$\frac{v}{{{r^2}}}$
If the frequency of an object in uniform circular motion is doubled, its acceleration becomes
Two particles each of mass $m$ are moving in horizontal circle with same angular speed. If both string are of same length then the ratio of tension in string $\frac{T_1}{T_2}$ is .........
In uniform circular motion, the velocity vector and acceleration vector are
The kinetic energy $k$ of a particle moving along a circle of radius $R$ depends on the distance covered $s$ as $k = as^2$ where $a$ is a constant. The force acting on the particle is
A particle at a distance of $1 m$ from the origin starts moving, such that $d r / d \theta=r$, where $r$ and $\theta$ are polar co-ordinates. Then, the angle between resultant velocity and tangential velocity is