What is the physical quantity represented by the unit $rpm$? Express it in $rad/s$.

In uniform circular motion, which of the following statements is wrong?

$A$ body is revolving with a uniform speed '$v$' in a circle of radius '$r$'. The tangential acceleration is:

$A$ particle undergoes uniform circular motion. About which point on the plane of the circle will the angular momentum of the particle remain conserved?

$A$ particle is moving on a circular path of radius $r$ with uniform speed $v$. What is the displacement of the particle after it has described an angle of $60^{\circ}$?

Can a moving object have a constant speed but a changing velocity?