A bucket containing water is whirled in a vertical plane. What is the condition required to ensure that water does not spill from the bucket even at the upper-most point of the path? Assume r is the radius of the path and v is the velocity of the bucket.

A) The bucket should have a velocity of
r
.
B) The bucket should have a velocity of
g
.
C) The bucket should have a minimum velocity of
gr
.
D) The bucket should have a maximum velocity of
g/r
.