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  4. 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

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Q. 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

IIT JEEIIT JEE 2009System of Particles and Rotational Motion

Solution:

On a system of particles if, $\Sigma F _{\text {ext. }}=0$
then, $p _{\text {system }}=\text { constant }$
No other conclusions can be drawn.