study this.
http://www.jiskha.com/display.cgi?id=1289045720
A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of 18m/s. The cliff is 52 meters above the waters surface. How long does it take for the stone to fall to the water? with what speed does it strike the water?
3 answers
24
36m/s