Review | Constants Part A A ball is thrown horizontally from the top of a cliff with initial speed vo(at t =0). At any moment, its direction of motion makes an angle & to the horizontal. Derive a formula for @ as a function of time, t, as the ball follows a projectile's path. (Figure 1) Express your answer in terms of the variables g, t, and vo. AEd 18 | ? 0 = Figure