A projectile of mass 0.525 kg is shot from a cannon, at height 6.6 m, as shown in the figure, with an initial velocity v having a horizontal component of 6.9 m/s. The projectile rises to a maximum height of Ay above the end of the cannon's barrel and strikes the ground a horizontal distance Az past the end of the cannon's barrel. Vi 47 Ay 6.6 m Ar Find the vertical component of the initial velocity at the end of the cannon's barrel.