SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When something has speed in a certain direction it is called ____
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motion
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position
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velocity
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speed
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Explanation:
Detailed explanation-1: -The speed of an object in a particular direction is called the velocity of an object. It is the rate of change of displacement. Velocity is a vector quantity as it has both magnitude and direction while speed only possesses magnitude but not direction.
Detailed explanation-2: -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 m⋅s−1).
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