14.40: A small 1.35-gram mass is launched f
h k17*q2t;dur:zf s2 gyhcdu0rom the top of a cliff at an angle of
t qguk d02s ;d7hyr:*fchu z21$15.9^{\circ}$ 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)