Velocity time grap

Velocity Time Graph

Velocity time graphs are used to study the variation of velocity of an object with time. The velocity time graph of an object, traveling at three different journeys along a straight road, are:

a) Constant Velocity

b) Constant Acceleration

c) Variable Acceleration

a)Constant Velocity:

When the velocity of the body is constant then its velocity time graph is a horizontal straight line. Acceleration of the body is zero.

ɑ = ∆v/∆t = 0/∆t = 0

b) Constant Acceleration:

If equal velocity changes occur in equal intervals of time. Then the velocity time graph is straight line which raises the same height for equal intervals of time. The car moves with constant acceleration.

c)Variable Acceleration:

If the velocity of the body changes unequally in equal intervals of time. Then the acceleration of the body will not be uniform. The body moves along any arbitrary curved path. The point A on the graph corresponds to the time t. The slope of the tangent at the point A one the velocity time graph is equal to the instantaneous acceleration.

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