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A golf ball is struck at ground level. The speed of the golf ball as a function of time is shown in the figure below where t = 0 at the instant the ball is struck. The scaling on the vertical axis is set by va = 19 m/s and vb = 31 m/s. What is the initial launch angle θ? How far does the golf ball travel horizontally before returning to ground level? What is the maximum height above ground level attained by the ball? The figure below shows three paths for a football kicked from ground level. Ignoring the effect of air, rank (greatest → least) the paths according to (a) time of flight (b) initial vertical velocity component (c) initial horizontal velocity component (d) initial speed