Assume all other forces on Oscar are balanced. Which statement describes the forces on Oscar?
A: The forces are unbalanced, so there is a net force on Oscar.
B: The forces are balanced, so there is no net force on Oscar.
To determine if there is a net force on Oscar, look at the forces:
Earth's gravity is pulling Oscar down with a force of 400 N.
The diving board is pushing Oscar up with a force of 400 N.
The forces are in opposite directions, and the forces have the same magnitude: 400 N. This means that the forces are balanced, so there is no net force on Oscar.