Fundamental quantity and SI units.
Introduction of Velocity and Acceleration (Distance and Displacement)
Distance The distance covered by a moving body is the length of path covered by the body. In SI system, distance is measured in metre (m). It is a scalar quantity as it has only magnitude but no direction. Displacement The shortest distance covered by a moving body in a fixed direction is called displacement. In SI system, it is measured in metre (m). Displacement is a vector quantity as It has both magnitude and direction.
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