a stone is thrown horizontally from the top of a vertical wall with a velocity of 15m/s, hits the horizontal ground at a point 45m from the base of the wall. calculate the height of the wall. g=10m/s?

Answer 1

well, it takes 45/15 = 3 seconds to go 45m, so how far does a stone fall in 3 seconds?
h = 5 * 3^2 = 45 m