Answer to Question #96203 in Mechanics | Relativity for B Ranjith Kumar

Question

When swinging an object on a string, in which direction is the only force acting (excluding gravity)?


1)Inward from the object to your hand
2)Outward away from your hand
3)In the direction that the ball is currently moving
4)Opposite to the direction that the object is currently moving in

Answer 1

When an object experiences a circular motion, the velocity vector changes direction which generates an acceleration that is directed towards the center of the circle, which is the centripetal acceleration, and where an acceleration occurs, there must be a force (Second Law of Newton), therefore the only force considered, must be the tension and the direction is indicated in the diagram.

Therefore the solution is; option 1

$\boxed{\text{1)Inward from the object to your hand }}$