SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The speed and the direction of an object’s motion is it’s ____
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inertia.
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acceleration.
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velocity.
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None of the above
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Explanation:
Detailed explanation-1: -Velocity is a vector which has a magnitude and direction. The magnitude (or value) of the velocity is the object’s speed. The direction of the velocity vector is the direction which the object is moving.
Detailed explanation-2: -If an object is moving downwards, then its velocity is described as being downwards. So an airplane moving towards the west with a speed of 300 mi/hr has a velocity of 300 mi/hr, west. Note that speed has no direction (it is a scalar) and the velocity at any instant is simply the speed value with a direction.
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