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2.Motion in Straight Line
medium
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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