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

Answer 1

You know the rock is falling for 3 seconds. Why? (the horizontal speed is constant)

So, how far does it fall in 3 seconds?

h = 1/2 at^2