Context: Madelyn is sitting on a roller coaster cart as it reaches the bottom of a big loop. Earth's gravity is pulling down on Madelyn with a force of 600N. The seat of the cart is pushing up on Madelyn with a force of 1,200N.
Assume all other forces on Madelyn are balanced. Which statement describes the forces on Madelyn?
A. The forces are unbalanced, so there is a net force on Madelyn.
B. The forces are balanced, so there is no net force on Madelyn.
From the given choices, choose the correct answer and respond with the letter of that choice.

A