If the resultant of all the external forces acting on a system of particles is zero. Then from an inertial frame, one can surely say that

Options

A. linear momentum of the system does not change time
B. kinetic energy of the system does not change in tire.
C. angular momentum of the system does not change time
D. potential energy of the system does not change in time

Answer

A

Explanation

Linear momentum remains constant if net external force on the system of particle is zero