Question

define velocity and its formula and si unit
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Answer 1

Answer:

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Velocity is a physical vector quantity; both magnitude and direction are needed to define it. The scalar absolute value (magnitude) of velocity is called speed, being a coherent derived unit whose quantity is measured in the SI (metric system) as metres per second (m/s) or as the SI base unit of (m⋅s−1).

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Answer 2

Velocity is defined as the displacement per unit time in a particular direction

SI unit m/s. It is vector quantity