Question

When a bucket containing water is rotated fast in a vertical circle of radius R, the water in the bucket doesn't spill provided(a) the bucket is whirled with a maximum speed of $\sqrt{2gR}$(b) the bucket is whirled around with a minimum speed of$\sqrt{[(\frac{1}{2})gR]}$(c) the bucket is having a rpm of $\sqrt{900g(\pi^{2}R)}$(d) the bucket is having a rpm of $\sqrt{3600g(\pi^{2}R)}$

Answer 1

Which class question is it?

Answer 2

(c): the bucket is having a rpm of root 900g/pi^2R