V - t graph of a moving object is given in figure. maximum acceleration is........... mathrm{cm/sec}

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2.Motion in Straight Line

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The $v - t$ graph of a moving object is given in figure. The maximum acceleration is...........$\mathrm{cm/sec}^{2}$

A

$1$

B

$2$

C

$3$

D

$6$

Solution

(d) Maximum acceleration means maximum change in velocity in minimum time interval.

In time interval $t = 30$ to $t = 40\,sec $

$a = \frac{{\Delta v}}{{\Delta t}} = \frac{{80 – 20}}{{40 – 30}} = \frac{{60}}{{10}} = 6\;cm/{\sec ^2}$

Standard 11

Physics

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