Kathy's Superseat Theory

Kathy is a 16 year old girl with huge intellect.
According to her physics teacher, her "abilities" are not shown throughout the class, therefore, she was failing.
A theoretical genius failing a physics class, pitiful, i know, so, he gave her an opportunity to come up with a theory and prove it so she could avoid her failure.
And that, my friends, is how Katherine invented the brilliant Superseat theory.