A small mass m is attached to a massless string whose other end is fixed at P as shown in figure. The mass is undergoing circular motion in x-y plane with centre O and constant angular speed `omega`. If the angular momentum of the system, calculated about O and P and denoted by

Options

A. `vecL_(0)` and `vecL_(P)` do not vary with time
B. `vecL_(0)` varies with time while `vecL_(P)` remains constant
C. `vecL_(0)` remains constant while `vecL_(P)` varies with time
D. `vecL_(0)` and `vecL_(P)` both vary with time

Answer

C

Explanation

Magnitude and direction of `vecL_(0)` remain constant.

Magnitude of `vecL_(p)` remains constant but direction of `vecL_(p)` change.