## What is meant by moment of inertia physics?

moment of inertia, in physics, quantitative measure of the rotational inertia of a body—i.e., the opposition that the body exhibits to having its speed of rotation about an axis altered by the application of a torque (turning force). The axis may be internal or external and may or may not be fixed.

**Why is it called a moment of inertia?**

Moment of inertia is the quantitative measure of the rotational inertia of a body. The term moment of inertia was first used by Leonhard Euler in his book Theoria motus corporum solidorum seu rigidorum in 1765, and later it was incorporated into Euler’s second law.

### What is the moment of inertia of the object?

Moment of inertia, denoted by I, measures the extent to which an object resists rotational acceleration about a particular axis, and is the rotational analogue to mass (which determines an object’s resistance to linear acceleration).

**What is unit of moment of inertia?**

The SI unit of moment of inertia is kg. m2.

#### What is moment of inertia 12th class?

Moment of inertia can be defined as a quantity that expresses a body’s tendency to resist angular acceleration, which is equal to the sum of the products of the mass of each particle in the body with the square of its distance from the axis of rotation.

**What is moment of inertia also called?**

The moment of inertia, otherwise known as the mass moment of inertia, angular mass, second moment of mass, or most accurately, rotational inertia, of a rigid body is a quantity that determines the torque needed for a desired angular acceleration about a rotational axis, akin to how mass determines the force needed for …

## What is the SI unit of moment of inertia?

kg.m2

The SI unit of moment of inertia is kg. m2.

**What is moment of inertia and its unit?**

Moment of inertia is defined as the tendency of an object to remain in a state of rest or of a constant rotational velocity. Greater the moment of inertia, more torque is required to change this state. Torque in rotational motion plays the same role as force in linear motion. Its SI unit is kg. metre2.

### Why is moment of inertia important?

The moment of inertia (MOI) is one of the many mass properties that describe an object’s stability and the forces needed to alter its motion. For aerospace engineering, stability is a crucial element in designing and manufacturing air and spacecraft.

**What is moment of inertia BYJU?**

Moment of inertia is defined as the quantity expressed by the body resisting angular acceleration which is the sum of the product of the mass of every particle with its square of a distance from the axis of rotation.