Question

state the law of convention of angular moment and explain it with an example

Answer 1

When the net external torque acting on a system about a given axis is
zero , the total angular momentum of the system about that axis remains constant.


The law of conservation of angular momentum states that when no external torque acts on an object, no change of angular momentum will occur.

, the increase in rotational speed of a spinning figure skater as the skater's arms are contracted is a consequence of conservation of angular momentum. The very high rotational rates of neutron stars can also be explained in terms of angular momentum conservation.

Answer 2

The law of conservation of angular momentum states that when no external torque acts on an object, no change of angular momentum will occur.

An example of conservation of angular momentum is seen in an ice skater executing a spin, as shown in . The net torque on her is very close to zero, because                                                                                                          1) there is relatively little friction between her skates and the ice, and                2) the friction is exerted very close to the pivot point.