Some doubts regarding rotational dynamics

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SUMMARY

This discussion centers on the dynamics of a mass rotating in a circular path, specifically analyzing the forces acting on a ball tied to a string. The primary external force is tension, which counteracts the gravitational force (mg) acting downward. When the ball is twirled in a horizontal circle, the string forms an angle with the horizontal, resulting in a net vertical force of zero. The net external force acting on the mass in circular motion is directed towards the center of the circle, maintaining the circular path.

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dreamz25
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a) suppose we tie a ball with a string and rotate it keeping its other end tied with one of our fingers then the only external force acting on it is the tension. Which force then cancells 'mg' acting vertically downward?

b) if a mass is rotating in a circular path then in which direction does the net external force acting on it acts?
 
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dreamz25 said:
a) suppose we tie a ball with a string and rotate it keeping its other end tied with one of our fingers then the only external force acting on it is the tension. Which force then cancells 'mg' acting vertically downward?
Not exactly sure what you are describing. But if you twirl the ball on the end of a string in a horizontal circle, the string will make an angle with the horizontal. The net vertical force will be zero.
b) if a mass is rotating in a circular path then in which direction does the net external force acting on it acts?
What do you think?
 

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