Forces acting on object hanging from rearview mirror

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The discussion centers on the forces acting on a ball hanging from a string in a car driving around a circular track. Participants debate the correct forces, with options including tension, gravity, centripetal force, and friction. The consensus is that the correct forces are tension and gravity, as friction is not applicable due to the lack of contact with another surface. The initial suggestion that friction should be included is dismissed, emphasizing that the ball does not interact with anything moving at a different speed. Ultimately, the forces acting on the ball are tension and gravity.
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A string is hanging from the rearview mirror of you car and a ball is at the end of this string. Suppose that you drive around a circular track at fixed speed. Which list below gives all the forces that act on the ball?

A) tension and the force of gravity
b) tension force of gravity and centripetal force
c) tension force of gravity and friction
d) tension only
I believe the answer is c, is this correct?
 
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No. Why should there be friction? There is no contact of the ball with anything that has
a different speed.
 

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