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Asked by ashutosharnold1998 18th April 2020, 12:14 PM
Answered by Expert
Answer:
Answer :- Velocity of centre of mass will vary, if the net external force acting on the system of particles is zero
 
(a) Momentum of the system will not vary .
         If it varies , velocity will vary for constant mass. This is not possible without external force
 
(b) Kinetic energy of  the system will not vary .
        If it varies , velocity will vary for constant mass. This is not possible without external force
 
(d) Position of centre of mass will not vary in absence of external forces.
Answered by Expert 18th April 2020, 12:41 PM
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