Internal forces acting within a system of par | vedclass

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Question

(C) According to Newton's second law,the rate of change of linear momentum of a system is equal to the net external force acting on it: $\vec{F}_{ext}

Vedclass · Accepted Answer

The kinetic energy of the system,but not the linear momentum of the system

Vedclass · Answer

(C) According to Newton's second law,the rate of change of linear momentum of a system is equal to the net external force acting on it: $\vec{F}_{ext} = \frac{d\vec{p}}{dt}$.Since internal forces always occur in action-reaction pairs,their vector sum is zero. Therefore,internal forces cannot change the total linear momentum of a system.However,internal forces can perform work on the particles of the system,which can change the internal configuration or the relative velocities of the particles,thereby altering the total kinetic energy of the system.Thus,internal forces can change the kinetic energy of the system,but not the linear momentum.

Internal forces acting within a system of particles can alter

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