Assertion (A): If there is no external torque | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) The Assertion $(A)$ is false. The absence of external torque about the centre of mass implies that the angular momentum of the body remains consta

Vedclass · Accepted Answer

If Assertion is true but Reason is false.

Vedclass · Answer

(C) The Assertion $(A)$ is false. The absence of external torque about the centre of mass implies that the angular momentum of the body remains constant,not the velocity of the centre of mass. The velocity of the centre of mass remains constant only if the net external force acting on the body is zero.The Reason $(R)$ is true. According to the law of conservation of linear momentum,the linear momentum of an isolated system (where the net external force is zero) remains constant.Since the Assertion is false and the Reason is true,the correct option is $(C)$.

Assertion $(A):$ If there is no external torque on a body about its centre of mass,then the velocity of the centre of mass remains constant.
Reason $(R):$ The linear momentum of an isolated system remains constant.

Similar Questions

If the total external forces on the system of particles is zero,then find the velocity and acceleration of its centre of mass.

If a force $10 \hat{i} + 15 \hat{j} + 25 \hat{k}$ acts on a system and gives an acceleration $2 \hat{i} + 3 \hat{j} - 5 \hat{k}$ to the centre of mass of the system,the mass of the system is

Which types of forces act on a system of particles?

Two spheres of masses $2M$ and $M$ are initially at rest at a distance $R$ apart. Due to mutual force of attraction,they approach each other. When they are at a separation $R/2$,the acceleration of the centre of mass of the system would be ....... $m/s^2$.

Under which force the centre of mass is moving?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Assertion $(A):$ If there is no external torque on a body about its centre of mass,then the velocity of the centre of mass remains constant.Reason $(R):$ The linear momentum of an isolated system remains constant.