If the sum of the external torques acting on an isolated system of particles is zero,it must be true that
A)the system can have no kinetic energy.
B)the angular momentum of the system does not change.
C)the system can have no angular velocity.
D)the system can have no linear velocity.
E)the angular momentum of the system must be continually decreasing.

Question

Quizplus · Accepted Answer

The conservation of angular momentum states that if the sum of the external torques acting on an isolated system of particles is zero, then the angular momentum of the system does not change. The other options are not necessarily true. The system may still have kinetic and/or linear velocity, and the angular momentum may not be continually decreasing.

If the Sum of the External Torques Acting on an Isolated