Vector: a quantity with both magnitude and direction, such as speed, acceleration, force and displacement. Generally speaking, it is called vector in physics and vector in mathematics.

Scalar is also called "vector-free". Some physical quantities have only numerical values and no direction. The operation between these quantities follows the general algebraic law and is called "scalar". Such as mass, density, temperature, work, energy, distance, speed, volume, time, heat, resistance, power, potential energy, gravitational potential energy, electric potential energy and other physical quantities.