Question

If the angular momentum of a body is zero about some point. Is it necessary that it will be zero. About a differet point?

Answer 1

Answer:

Explanation:

If angular momentum about a point is 0 then it is not necessary that it is zero about the other point.

now,

angular momentum = r × p

where r is the perpendicular distance from the point to the body and p is its linear momentum.

so if we find angular momentum of the same body about other point then r will vary and so will angular momentum.

hope it helps you!!! :)

Answer 2

Given: The angular momentum of a body is zero about some point.

To find: Angular momentum at different point.

Solution:

We know that,

            The angular momentum is given by

                                 $L= r \times P$

           Here,

           $L =$ Angular momentum

           $r =$  Distance

           $p=$  Linear momentum

from the above formula it is clear that L can be 0 in two conditions

1. If $p$ or $r$ is $0$

 2. These two vectors point are parallel or anti parallel.

             angle between them is  $0^ \circ$ or $180^ \circ$.

 Thus, it is not necessary that angular momentum is 0 everywhere, it can definitely give a finite value.