14.40: A small 1.35-gram mass is launc
*c 6hl0t cduvseva6k*/rh9 d.hed from the top of a cliff at an angle of
c s v6 edr/0*k.cua6d*9vlt hh$15.9^{\circ}$ 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)