(1) total external force acting on the system is zero. |
(2) total external force acting on the system is finite and time of collision is negligible. |
(3) total internal force acting on the system is zero. |
A) (1) only
B) (2) only
C) (3) only
D) (1) or (2)
Correct Answer: A
Solution :
From Newtons second law, \[F=\frac{dp}{dt}\] If \[F=0,\]then \[\frac{dp}{dt}=0\] \[\Rightarrow \] p = constant. Thus, if total external force acting on the system is zero, then linear momentum of the system remains conserved.You need to login to perform this action.
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