Question
The value of α for which angular momentum about origin is conserved is
-
-1
-
2
-
zero
-
1
-1
2
zero
1
Solution
A.
-1
When the resultant external torque acting on a system is zero, the total angular momentum of a system is zero, the total angular momentum of a system remains constant.This is the principle of the conservation of angular momentum.
Given,
