1. The problem statement, all variables and given/known data A pendulum consists of point mass Mo swinging on a massless string of length Lo, with period To = 7.23 s on the surface of the Earth (at RE, the radius of the Earth). Find T1, the period of the same pendulum if it swings on a horizontal platform of height H = 2.23RE (stationary, not orbiting) above the Earth's surface. 2. Relevant equations T = 2∏√(L/g) g = G * Mass of Earth/R^2, where R = radius of Earth 3. The attempt at a solution Squaring both sides of the Period, T, equation, we get, T on surface of Earth: T^2 = 7.23^2 = 4∏^2(L/g), = 4∏^2(L)*R^2 / (G)(Mearth), and, T at 2.23R above the Earth: T^2 = 4∏^2(L)*(2.23R)^2 / (G)(Mearth) Dividing both equations, and solving for T, T = √(7.23^2)(2.23)^2 = 16.1229 Am I doing something wrong here? Many thanks in advance.