Question 730: Centre of Mass and Rotational Motion

Question

STATEMENT 1
If there is no external torque on a body about its center of mass, then the velocity of the center of mass remains constant.
Because
STATEMENT 2
The linear momentum of an isolated system remains constant.

Accepted Answer

Statement 1 : For velocity of centre of mass remains constant, net force acting on body must be zero. Therefore the statement 1 is false.
Statement 2 : The linear momentum of an isolated system remains constant. The statement is true.

Answer

Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1.

Answer

Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1.

Answer

Statement-1 is True, Statement-2 is False.

Answer

Statement-1 is False, Statement-2 is True.

Centre of Mass and Rotational Motion

STATEMENT 1 If there is no external torque on a body about its center of mass, then the velocity of the center of mass remains constant. Because STATEMENT 2 The linear momentum of an isolated system remains constant.

Choose the correct answer: