Rotational Motion Question 86
Question: A force
Options:
A) - 1
B) 2
C) zero
D) 1
Show Answer
Answer:
Correct Answer: A
Solution:
-
Key Concept When the resultant external torque acting on a system is zero, the total angular momentum of a system remains constant.
This is the principle of the conservation of angular momentum.
Given, force
As, angular momentum about origin is conserved.
i.e.
Torque,
So value of a for angular momentum about origin is conserved,
