### Rolling Motion

The combination of rotational motion and the translation motion of a rigid body is known as rolling motion. The kinetic energy associated with a body...

### Moment of Inertia

The inertia of rotational motion is called the moment of inertia. It is denoted by L.
Moment of inertia is the property of an object...

### Rigid body Rotation and Equation of Rotational motion

The resultant torque acting on the body must be zero. The sum of anti-clockwise torques about any axis must be equal to the sum...

### Equilibrium of Rigid Bodies

A rigid body is said to be in mechanical equilibrium if both its linear momentum and angular momentum are not changing with time, or...

### Angular Momentum (ρ)

The quantity of rotational motion in a body is called its angular momentum. Thus angular momentum plays the same role in rotational motion as...

### Moment of force (Torque)

The motion of a rigid body, in general, is a combination of rotation and translation. If the body is fixed at a point or...

### Centre of mass of a Uniform Rod

Suppose a rod of mass M and length L is lying along the x-axis with its one end at x = 0 and the...

### Linear Momentum of a system of Particles

The linear momentum of a particle is defined as p = m v Let us also recall that Newton’s second law written in symbolic form for...

### Motion of Centre of Mass

The definition of the centre of mass, we are now in a position to discuss its physical importance for a system of particles. …………..(3) Differentiating...

### The centre of mass

The centre of mass of a system of particles moves as if all the mass of the system was concentrated at the centre of...