A metre rule is freely pivoted about its centre. A piece of mud of mass 20g travelling at 5ms-1 strikes and sticks to one end of the rule so that the rule starts to rotate in a horizontal circle. If the moment of Inertia of the rule and the mud about the pivot is 0.02kgm^2, the initial angular velocity of the rule is....(Answer:2.5rads-1) I have made assumption that the momentum of the mud is transfer solely to the angular momentum. (mv=Iw) I got the answer 5 rads-1, obviously wrong. I believe that my assumption is wrong. How should I attempt this question?