1.

Consider the following two statements. a. Linear momentum of a system of particles is zero. b. Kinetic energy of a system of particles is zero. Then

Answer»

a implies B and b implies a.
a does not imply b and b does not imply a
a implies b but b does not imply a
a does not imply b but b implies a

Solution :Here, `E_k=1/2mv^2`
As`E_k=0v=0``(because m ne 0)`
Also, momentum= mv
It v=0 , momentum = 0
Thus (b) implies (a).
But, when there is no RESULTANT momentum, there can NEVER be a net force by second law.This can RESULT in a constant non-zero VELOCITY an hence K.E. Thus (a) does not imply (b).


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