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Speed is a scalar quantity in physics, representing only magnitude without direction. Instantaneous and average speeds are scalar quantities in contrast to vector quantities like velocity. Scalar quantities lack directional information and are represented solely by numerical values.
Speed is a scalar quantity because it only has magnitude and no direction associated with it. Unlike velocity, which is a vector quantity representing speed and direction, speed solely measures how fast an object is moving.
Instantaneous speed is an example of a scalar quantity, as it describes the speed of an object at a specific moment without considering direction. Average speed is calculated by dividing the total distance traveled by the time taken and is also a scalar quantity.
In physics, scalar quantities are represented by numerical values alone, without any directional information, making them distinct from vector quantities that require both magnitude and direction.
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