Question

20. The slope of v-t is zero at point-

(a) A
(c) C
(b) B
(d) D​

Answer 1

Answer:

AT POINT B SLOPE OF V-t graph is 0.

Explanation:

AS WE KNOW SLOPE OF V-T GRAPH GIVES ACCELERATION SO AT POINT B VELOCITY IS CONSTANT SO ACCELERATION IS 0.

Answer 2

Answer:

The correct option is (b) B

Explanation:

• Slope: In a graph slope is calculated by the formula:

                  slope = $\frac{Change in y axis}{ change in x axis}$ = $\frac{\delta y}{\delta x}$

• Slope is zero means Change in y-axis = 0

       If there is no change in the value along Y-axis but X-axis value keep changing, then we gat a straight line parallel to X-axis.

When the graph is parallel to X-axis then only the slope becomes 0.

• In given graph 'B' is the only point situated on the part of the graph, which is parallel to X-axis.
• In v-t graph the slope indicates the acceleration. Slop = 0 at B point, so the acceleration of the particle at B point is zero.
• A point is having positive slope or positive acceleration. But C, D points are having negative slope or negative acceleration. None of them are zero.

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