JEE Advanced 2007 Physics 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.

(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 TrueCorrect

Answer: (D)

Solution

Statement-1: zero torque about the centre of mass does not mean zero net force — e.g. gravity acting on a projectile exerts no torque about its centre of mass, yet the centre of mass accelerates.

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-037479