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The given graph shows the variation of v...

The given graph shows the variation of velocity with displacement. Which one of the graphs given below correctly represents the variation of acceleration with displacement ?

A

B

.

C

.

D

.

Text Solution

Verified by Experts

The correct Answer is:
A

Given line have positive intercept but negative slope. So its equation can be written as
`v = -mx + v_0` …(i) `["where" m = tan theta = (v_0)/(x_0)]`
By differentiating with respect to time we get
`(dv)/(dt) = -m (dx)/(dt) = - mv`
Now substituing the value of `v` from eq. (i) we get
`(dv)/(dt) = -m[ -mx + v_0] = m^2 x - mv_0 :. a = m^2 x - mv_0`
i.e., the graph between `a` and `x` should have positive slope but negative intercept on a-axis. So graph (a) is correct.
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