Question

How would earth move if the sun suddenly disappeared

Answer 1

If that were true, then the first thing that would happen when the sun disappeared is that Earth, along with all the other planets, would go flying off into space. It would be complete and utter chaos in our solar system.

Answer 2

If the sun disappeared suddenly, then first of all, we would all die immediately. The planets inside our solar system would go flying off into space, even crashing into each other.