FYKOS Year 30 Series 1 Problem 4 — The world is tilted · FYKOS 30 #30.1.4
Physics · mechanics
Problem
An observer is on a ship in the open sea, in the height h above the sea surface. There is a horizontal railing in the distance d from him, in such a position, that when he looks directly, perpendicularly at it, the bottom edge of the railings touches the horizon. However, when he looks at the part of the railing that is distance l to the left of the original point, the horizon appears to be s±ss lower. What is the radius of the Earth.