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?
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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.
Thanks. The answer I was looking for.
as i had learned it is always center seeking, it being a force which is perpendicular to velocity.