1. The problem statement, all variables and given/known data 7. During World War I, the German army bombarded Paris with a huge gun referred to, by the Allied Forces, as “Big Bertha.” Assume that Big Bertha fired shells with an initial velocity of 1.1 x 10^3 m/s [45° above the horizontal]. (a) How long was each shell airborne, if the launch point was the same as the landing point 2. Relevant equations dy = v1xT+1/2ax X t^2 3. The attempt at a solution v1 = 1.1 x 10^3 a= -9.81 t = ?