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.
To determine if there is a net force on Madelyn, look at the forces:
Earth's gravity is pulling Madelyn down with a force of 600 N.
The seat of the cart is pushing Madelyn up with a force of 1,200 N.
The forces are in opposite directions, and the forces have different magnitudes: 600 N and 1,200 N. This means that the forces are unbalanced, so there is a net force on Madelyn.