If I had a marble tied to a string traveling in a circle on a frictionless table at a constant velocity, are there any forces that act in the opposite direction of the string's tension? What are they?

Question

turingtest · Answer

The tension of the string creates a pull toward the center which is called centripetal force. By newtons third law, all forces come in an action-reaction pair. In the case of centripetal force, the reaction is a force outward called centrifugal force (centri=center, fugal=away from), which is exerted by the marble on the string.

anonymous · Answer

Thanks. The answer I was looking for.

anonymous · Answer

as i had learned it is always center seeking, it being a force which is perpendicular to velocity.

turingtest · Answer

the force of the string always pulls the object toward the center, but the reaction force of the object itself is outward

anonymous · Answer

of course, if that was center seeking as well the object would just fly to the middle