Water in a bucket is whirled in a vertical circle with a string attatched to it. The water does not fll down even when thebucket is inverted at the top of its path. We conclude that in this position

Options

A. `mg=(mv^2)/(r)`
B. mg is greater than `(mv^2)/(r)`
C. mg is not greater than `(mv^2)/(r)`
D. mg is not less than `(mv^2)/(r)`

Answer

C

Explanation

For water does not fall at topmost point of path that mcans at topmost point N should be greater than or equal to zero.
For N=0, mg=`(mv^2)/(r)`
and for `N gt 0,` mg `lt(mv^2)/(r)`
So that mg is not greater than `(mv^2)/(r)`