The net force on this rugby ball is 0  N0  N. What can we say about the individual forces acting on the ball?

If the net force on the rugby ball is 0 N, it means that the individual forces acting on the ball are balanced. This could mean one of two things:

1. There are no forces acting on the ball at all.
2. There are forces acting on the ball, but they are equal in magnitude and opposite in direction, thus cancelling each other out.

In the context of a rugby ball, it's more likely the second scenario. For example, the force of gravity pulling the ball downwards is balanced by an equal force pushing it upwards. This could be the normal force from the ground (if the ball is at rest), or aerodynamic lift (if the ball is in flight).