Question

) A man holds a pail of water by the handle and whirls it around a vertical circle of radius 0.86 m at constant speed. What is the minimum speed that the pail must have at the top of its circular motion if the water is not to spill out of the upside-down pail?

Answer 1

centripetalforce=mg
m*v^2/r=mg
v= sqrt (rg)