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JEE Advanced 2009Paper 1
Exam
JEE Advanced
Year
2009
Paper
Paper 1
Subject
Physics
Chapter
Center of Mass, Momentum and Collision

JEE Advanced 2009 · Paper 1 · Physics · Center of Mass, Momentum and Collision

If the resultant of all the external forces acting on a system of...

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, \Sigma F→ext.=\overrightarrow{\mathbf{F}}_{\mathrm{ext} .}=0 then P→system =\quad \overrightarrow{\mathbf{P}}_{\text{system }}= constant No other conclusions can be drawn.
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