When the see-saw is balanced:

* Yes, the forces are balanced. This means the total force on one side of the see-saw is equal to the total force on the other side.

* The see-saw will be stationary, or moving with a constant velocity.

When the see-saw is not balanced:

* No, the forces are unbalanced. This means there's a greater force on one side than the other.

* The see-saw will tilt towards the side with the greater force.

To achieve balance:

* Equal weights: If the people on each side of the see-saw have equal weight, they can achieve balance by sitting at the same distance from the pivot point (the center of the see-saw).

* Unequal weights: If the people have different weights, they can achieve balance by adjusting their distances from the pivot point. The heavier person needs to sit closer to the pivot point to balance the lighter person sitting further away.

Key takeaway: A see-saw is only balanced when the forces on both sides are equal, considering both the weight of the people and their distance from the pivot point.