Question

If the external force applied is zero then which of the following is conserved ??
1.linear momentum
2. Angular momentum
3.torque
4. Time period

Answer 1

Linear momentum is conserved if external force applied is zero; according to Newton's second law of motion

Hope this helps..

Answer 2

Answer:

When there is no external force operating on a system, the linear momentum remains constant and hence preserved, 1 is the correct response

Explanation:

Linear momentum is a vector quantity defined as the product of an object's mass, m, and velocity, v. conservation of linear momentum, the general law of physics stating that the quantity is known as momentum, which characterises motion, never changes in an isolated collection of objects; that is, the total momentum of a system remains constant.

Momentum Conservation Requirements

• During the interaction, the system's mass must stay constant.
• The system's net external force must be zero.

When the external force acting upon a system is zero, the linear momentum is constant and hence is conserved.

Explanation:

Linear momentum is the vector quantity and defined as the product of the mass of an object, m, and its velocity, v.

conservation of linear momentum, general law of physics according to which the quantity called momentum that characterizes motion never changes in an isolated collection of objects; that is, the total momentum of a system remains constant.

Requirements for Momentum Conservation

The mass of the system must remain constant during the interaction.

The net external force on the system must be zero.