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 Linear momentum of the system does not change in time-Kinetic energy of the system does not change in time-Angular momentum of the system does not change in time-Potential energy of the system does not change in time-

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Standard XII

Physics

Newton's Laws for System of Particles

If the result...

Question

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

Linear momentum of the system does not change in time.

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Kinetic energy of the system does not change in time.

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Angular momentum of the system does not change in time.

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Potential energy of the system does not change in time.

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Solution

The correct option is A
Linear momentum of the system does not change in time.

${\to F}_{e x} = 0 \Rightarrow \frac{d \to P}{d t} = 0 \Rightarrow \to P = c o n s t a n t$

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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

The correct option is A Linear momentum of the system does not change in time. →Fex=0⇒d→Pdt=0⇒→P=constant

The correct option is A
Linear momentum of the system does not change in time.

${\to F}_{e x} = 0 \Rightarrow \frac{d \to P}{d t} = 0 \Rightarrow \to P = c o n s t a n t$