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Q. The slope of the straight line connecting the points corresponding to $\left(v_{2}, t_{2}\right)$ and $\left(v_{1}, t_{1}\right)$ on a plot of velocity versus time gives

Motion in a Straight Line

Solution:

Average acceleration is defined as the average change of velocity per unit time. On a plot of $v-t$, the average acceleration is the slope of the straight line connecting the points corresponding to $\left(v_{2}, t_{2}\right)$ and $\left(v_{1}, t_{1}\right)$.