Posted by Anonymous on Monday, October 19, 2009 at 10:46am.
you swing the pail in a vertical circle of radius 0.900m.What minimum speed must you give the pail at the highest point of the circle if no water is to spill from it?

Physics  bobpursley, Monday, October 19, 2009 at 11:05am
well, centripetal force must be greater than weight
mg<=mv^2/r
v>=sqrt(g*r)
check that.

Physics  Anonymous, Monday, October 19, 2009 at 11:08am
i don't know where to go from there

Physics  bobpursley, Monday, October 19, 2009 at 11:22am
v is the minimum speed.

Physics  Young J. Hong, Friday, February 15, 2013 at 5:17pm
Consider the following equation in the ydirection.
Fy=T+Fg=ma
Or in this case...
T+Fg=(mv^2)/R
Tension equals to 0 because when the pail of water is at the highest point, tension is nonexistent.
Therefore...
mg=(mv^2)/R
Cancel out mass
g=(v^2)/R
(Rg)^(1/2)=v
Plug in values.
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