Question

Satement-1: if there is no external torque on a body about its centre of mass, then the velocity of the center of mass remains constant.
Statement-2: The linear momentum of an isolated system remains constant.
A. Statement-1 is true Statement -2 is True, Statement-2 is a correct explanation for Statement -1
B. Statement -1 is True, Statement -2 is True, Statement-2 is NOT a correct explanation for Statement -1
C. Statement-1 is True, Statement-2 is False
D. Statement -1 is False, Statement-2 is True

Answer 1

Correct Answer - D
(d)Statement-1: For velocity of centre of mass of remain
constant the net force acting on a body must be zero.
Therefor the statement 1 is false.
Statement-2: The linear momentum of an isolated
system remain constatn. This statement is true.