Centre Of Mass Of Hollow Cone MCQ - Practice Questions with Answers

Have a look at the figure of Hollow Cone

Since it is symmetrical about y-axis  

So we can say that  its and

 Now we will calculate its which is given by

So Take a small elemental ring of mass dm of radius r  at a vertical distance y from O as shown in figure.

And

Since our element mass is ring so its C.O.M will lie on the y-axis.

 Now  

Where      

So       

So    from O.