Gujarati
4-1.Newton's Laws of Motion
easy

किसी निकाय का संवेग संरक्षित रहता है

A

हमेशा

B

कभी नहीं

C

जब तक निकाय पर कोई बाह्य बल न लगे

D

इनमें से कोई नहीं

Solution

The law of conservation of momentum says that the momentum of a closed system is constant in time (conserved). A closed (or isolated) system is defined to be one for which the mass remains constant, and the net external force is $zero$. The total momentum of a system is conserved only when the system is closed.

Standard 11
Physics

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