1. The problem statement, all variables and given/known data A uniform rod of length l is given an impulse at right angles to its length as shown. Find the distance of instantaneous centre of rotation from the centre of rod. 2. Relevant equations 3. The attempt at a solution Impulse=change in momentum or Impulse=mvCM (Am i right here?) I am not sure about this but i think i need to conserve angular momentum. But how should i make the equation for initial angular momentum. Should it be mvCMx or mvCM(x+d), d is the distance of instantaneous centre of rotation of rod from the CM. Any help is appreciated!