31 m A ball is thrown from the top of a building upward at an angle of 39 to the horizontal and with an initial speed of 25 m/s, as in the figure. The ball is thrown at a height of 31 m above the ground and hits the ground 89.1648 m from the base of the building. The acceleration of gravity is 9.8 m/s. 25 m/s 1 39 hand height ground level 89.1648 m What is the speed of the ball just before it strikes the ground? Answer in units of m/s.