Velocity


 
 
Concept Explanation
 

Velocity

Velocity

The velocity of an object is a quantity that gives the speed of an object as well as its direction of motion. Velocity has magnitude as well as direction. It is a vector quantity. Is the speed or the direction of the motion of an object is changed, its velocity changes. The velocity ‘5 km/hr,North’ is different from the velocity ‘7km/hr, North’.

Velocity of an object is the displacement of the object in a short time interval divided by the time interval. Or we can say that, velocity of an object is its displacement per unit time. Velocity can be positive, zero or negative.

Its SI unit is m/sec or metre/ second.

large Velocity ;(v) = frac{Displacement (d)}{ Time (t) }

Sample Questions
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Question : 1

When a body moves along a straight line,magnitude of its velocity is equal to speed the body.

Right Option : A
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Question : 2

A train 50 m long passes over a bridge at a velocity of 30 km/h.if it takes 36 s to cross the bridge, the length of the bridge will be

Right Option : C
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Explanation
Question : 3

The rate of change of displacement with time is:

Right Option : C
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Explanation
 
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