14.40: A small 1.35-gram mass is launched from the
o hd 6.u24vxvx top of a cliff at an angle of
ou4h .x dvv2x6 $15.9^{\circ}$ 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)