A projectile is fired from the origin (at y = 0 m) as shown in the diagram. The initial velocity components are V 0x = 310 m/s and V 0y = 26 m/s.The projectile reaches maximum height at point P, then it falls and strikes the ground at point Q, which is 20 m below the launch point. When the projectile reaches point Q, what is the vertical component of its velocity?