Velocity
Videos
Velocity is a measurement of speed in a certain direction of motion. It is a fundamental concept in kinematics, the branch of classical mechanics that describes the motion of physical objects. Velocit
As a change of direction occurs while the racing cars turn on the curved track, their velocity is not constant even if their speed is.
Angular momentum
Videos
Angular momentum is the rotational analog of linear momentum. It is an important physical quantity because it is a conserved quantity – the total angular momentum of an isolated system remains constan
This gyroscope remains upright while spinning owing to the conservation of its angular momentum.
A figure skater in a spin uses conservation of angular momentum – decreasing her moment of inertia by drawing in her arms and legs increases her rotational speed.