Rotation

A rotation is a circular movement of an object around a center (or point) of rotation. A three-dimensional object can always be rotated around an infinite number of imaginary lines called rotation axes. If the axis passes through the body's center of mass, the body is said to rotate upon itself, or spin. A rotation about an external point, e.g. the Earth about the Sun, is called a revolution or orbital revolution, typically when it is produced by gravity. Below you can check videos which can help you understand the concept a bit better:

Physics Wallah

Introduction Torque  Rotational Equilibrium
Moment of Inertia  Moment of Inertia of Rod, Ring, Disc, Cylinder Deviation Moment of Inertia of Hollow Sphere, Solid Sphere & Cone
Perpendicular & Parallel Axis Rigid Body Dynamics Hinge Forces
Kinetic Energry & Work done by Torque Angular Momentum Conservation of Angular Momentum
Translation + Rotational Motion Expression for P, K.E, L Pure Rolling
Forces in Pure Rolling Rolling on Inclined Plane

 

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