Question

A liquid is kept in a cylindrical jar, which is rotated about the cylindrical axis. The liquid rises at its sides. The radius of the jar is 'r' and speed of rotation is $'\omega'$. The difference in height at the center and the sides of the jar is

• A. $\frac{r^2\omega^2}{g}$
• B. $\frac{r^2\omega^2}{2g}$
• C. $\frac{g}{r^2\omega^2}$
• D. $\frac{2g}{r^2\omega^2}$

Answer 1

Answer: (B)

$\frac{r^2\omega^2}{2g}$

Answer 2

Potential energy = rotational K.E.