Physics HELP ASAP!!!!?

Question

You tie a cord to a pail of water, and you swing the pail in a vertical circle of radius 0.600 m. What minimum speed must you give the pail at the highest point of the circle if no water is to spill from it?

Answer 1

What are the forces acting on the pail at the top of the swing. If the speed is a minimum, then there will be no tension, so that the only force acting on it is gravity.

Since we have uniform circular motion...

F = m * a

mg = m * v^2 / r

v = sqrt (g*r)

in this problem,

v = sqrt(9.8 * .6) = 2.42m/s