The net force of an object, is the sum of all the forces acting upon it. The net force is equal to mass multiplied by acceleration. Weight, friction, and air resistance are all examples of forces. The Snorlax is not accelerating because it's net force is zero. Weight holds the object down, but the normal force of the table underneath the Snorlax, pushes it up to create a net force of zero. If a pikachu rolled a pokeball on a rough surface there would be frictional force pushing back against the force the pikachu is exerting on the pokeball. The weight plus the frictional force, plus the normal force, plus the force the pikachu is exerting on the pokeball would be the net force in this case.
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