Recent content by kolekrille

Because the equations are non-linear outside the Earth I use Matlab ode45-solver to solve them and get an oscillator that are somewhat modified from the harmonic if you drop the ball from 10000 km altitude. What I'm pointing at is that if you apply a large extra force to the ball as it passes...

... And the fun hasn't ended with this! Consider what happens if you smash the ball with racket in the center of the earth. If you smash it really hard (so it escapes the Earth's gravitational pull), it can get velocities that are actually much larger than if you had smashed it in free space...