Speed-time graph for a body moving along a straight line is shown in figure. average acceleration of

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2.Motion in Straight Line

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The speed-time graph for a body moving along a straight line is shown in figure. The average acceleration of body may be .......... $m / s ^2$

A$0$

B$4$

C$-4$

DAll of these

Solution

(d)
The acceleration from zero to $5 \,s$ is $a=\frac{0-20}{5-0}=\frac{-20}{5}=-4 \,ms ^{-2}$
From $5 \,s$ to $10 \,s$
$a=\frac{20-0}{10-5}=4 \,ms ^{-2}$
$a=\frac{\text { Total change in velocity }}{\text { Time }}$
$=\frac{20-20}{10-0}=0 \,ms ^{-2}$

Standard 11

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The speed-time graph for a body moving along a straight line is shown in figure. The average acceleration of body may be .......... $m / s ^2$

Solution

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