Which is a vector quantity?

Angular momentum is a concept in physics classed as a vector quantity because of its dual nature of having magnitude as well as direction; it is associated with the rotation of an object and can be thought of as the amount of motion that a body possesses while rotating about an axis. In contrast, work and potential energy are scalar quantities, which have only magnitude and no direction; they can give no information about the rotational properties of a system.

To illustrate further, work is the transfer of energy when a force is applied over a distance, whereas potential energy describes the stored energy of an object based on the position in a gravitational field. Similarly, electric current is also a scalar quantity quantifying the flow of electric charge in a circuit.

Angular momentum plays a very crucial role in many physical scenarios that explain the dynamics of rotating bodies, such as planets, spinning tops, and wheels. In an isolated system, it remains conserved, which means that the total angular momentum will not change unless acted upon by an external torque. The conservation principle is important for predicting the behavior of rotating systems both in classical and modern physics.

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