Suppose a vector v makes an angle theta with respect to the y axis, what could be the x and y components of the vector v

If the angle between the vector and the y-axis is  Θ ,
then the y-component of the vector is

                   (length of the vector) times  cosine( Θ ),

and the x-component of the vector is

                   (length of the vector) times  sine( Θ ) .

Centrapedial force is the answer

No. rocks can follow various pathways.