Answers

2015-09-23T15:02:36+05:30
WHEN NO EXTERNAL FORCE IS ACTING ON A BODY THEN THE NET  MOMENTUM OF THE SYSTEM IS CONSERVED.
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2015-09-23T15:04:31+05:30
It is to long and simple fourmala of concervation of momentum is
m1 + v1 = m2 + v2
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