Respuesta :
In sections 1 and 4 the ball is subjected to a balanced force. Hence, option C is correct.
What is the frictionless surface?
A Frictionless surface refers to that kind of surface where the force acting on any object which makes it difficult for the object to slide is almost zero or negligible, i.e., no resistance between surface or substance allowing the object to slide and move freely without any friction.
In sections 1 and 4 the ball is subjected to a balanced force. Hence, option C is correct.
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