1. The problem statement, all variables and given/known data An object of mass 4.5 kg is projected into the air at a 53° angle. It hits the ground 3.6 s later. What is its change in momentum while it is in the air? Ignore air resistance. 2. Relevant equations P = mv V=Ft/m 3. The attempt at a solution I'm not sure how to find the velocity for this question, otherwise I know how to find the answer.