Question #08422

1 Answer
A08
Mar 31, 2016

The Quantity Q is related to quantity P linearly.
And with an increase in Q there is decrease in P.

Explanation:

The general equation of a straight line can be written as
#y=mx+c# ....(1)
Where #m# is the slope of the line and #c# is the intercept on the #x# axis.
In the graph presented in the question the slope #m# is a negative quantity.

It could be a case of uniform retardation. Where with increase of time plotted on the #x# axis, the velocity of the object decreases linearly.

Recall #v=u+at#, where #v, u, a and t# are final velocity, initial velocity, acceleration and time elapsed.

For retardation #a# would be a negative quantity as it is acting in a direction opposite to the direction of motion. The equation will look like
#v=-at+u#
Comparing with (1), one can find the retardation and initial velocity.

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