VELOCITY-TIME GRAPHS
This graph is plotted by taking velocity on Y-axis and displacement on X-axis slope of this graph represents acceleration.Area under this graph gives displacement
a)If the graph is a straight line parallel to time axis, then body is moving with uniform velocity ‘u’.
b)If the graph is a straight line with a constant positive slope,then body is moving with uniform acceleration.
1)represent that body started from rest.
2)represent that body has initial velocity ‘u’.
c)If the graph is a straight line with a constant negative slope,then body is moving with uniform acceleration.
d)If the graph is a parabola or with a slopewhich increases at a steady rate,body is moving with increasing acceleration.
e)For a body projected vertically upwards from the ground,graph will be as shown.
Here \(
t_1 = \frac{u}
{g};t_2 = \frac{{2u}}
{g}
\)
Area below the graph is zero.Which indicates zero displacement on reaching ground.