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JEE Advanced2009PhysicsCenter of Mass, Momentum and CollisionActual

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

  1. Alinear momentum of the system does not change in time
  2. Bkinetic energy of the system does not change in time
  3. Cangular momentum of the system does not change in time
  4. Dpotential energy of the system does not change in time

Correct answer

A. linear momentum of the system does not change in time

Step-by-step solution

On a system of particles if, F _ ext . =0 then P _ system = constant No other conclusions can be drawn.

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