A small object of mass m is attached to a light string which passes through a hollow tube. The tube is hold by one hand and the string by theother. The object is set into rotation in a circle of radius R and velocity v. The string is then pulled down shortening the radius of path of r. What is conserved?

A small object of mass m is attached to a light string which passes th

1.	A small object of mass m is attached to a light string which passes through a hollow tube. The tube is hold by one hand and the string by theother. The object is set into rotation in a circle of radius R and velocity v. The string is then pulled down shortening the radius of path of r. What is conserved?
Answer» angular MOMENTUM linear momentum KINETIC ENERGY NONE of these Answer :A