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7. MOTION
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The position$-$time graph for the motion of a car is given below
$(i)$ How far the car tavelled in the time interval $2$ to $6 s ?$
$(ii)$ During which interval of time its speed was more?
$(iii)$ Calculate the average speed of the car.
Option A
Option B
Option C
Option D
Solution
$(i)$ $5 m$
$(ii)$ Between $2$ to $4\, s$ the slope of graph is more. So during this time interval speed of car will be more
$(iii)$ Average speed $=\frac{\text { Total distance covered }}{\text { Total time taken }}$
$=\frac{5 m }{4 s }=1.25 m s ^{-1}$
Standard 9
Science
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