14.40: A small 1.35-gram mas
r otchx56d(4 ms is launched from the top of a cliff at an angle of
x(ct 6mhor45d $15.9^{\circ}$ above the horizontal. When the mass reaches the ground 4.33 seconds later, its velocity is directed at $34.4^{\circ}$ below the horizontal. What is the speed of the mass when it reaches the ground? (ignore air resistance)