2.25 Problem Sets - Section 5


Problem 5.29: Hint 1

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Start with the angular momentum theorem (z-component, i.e. involving the theta component of velocity), and integrate all the equation with respect to time from time zero to the time the hose is turned off. This will give you the total final angular momentum in the swirling liquid. Then assume (approximately) a solid-body rotation as the final velocity profile, and calculate the rotation rate consistent with the final angular momentum of the water in the tank