In order for Rodinia to break apart and reform into Pangaea, you’d need an average of 500 miles of motion for each continental plate, each way. Then another 1000 miles of motion (average) for each plate after Pangaea broke up. Some plates moved shorter distances, others moved further (for example, Antarctica moved something like 2500 miles). Thankfully, the timescale doesn’t come into play for first-order approximations. Energy is force times displacement, so it takes ten times as much energy to move something ten times as far against the same amount of resistance.