Adjust the speed, acceleration, and the starting position of the blue and red dots according to the chase problems you have in your worksheet to visually see how the CATCH UP process look like.
A lighter mass orbiting a heavier mass. Because when two objects are dropped from the same height, the "curvature/steepness" of spacetime is the same for both objects, then even if the two masses are not the same their acceleration towards the center of the earth will be the same.
A Single Mass moving in spacetime. The spacetime surrounding the mass "bends" according to the mass, density of the object and its movements.
Gravitational Waves generated from two moving massive objects. Gravitational Waves travels at the speed of light!
Pay attention to how the PE and KE offset each other such that the Ttotal Energy of the system remains constant.