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Q.

A car is moving on a horizontal road whose acceleration versus position graph is drawn below. At the initial moment of time when particle was at  x=0, its speed was  10 m/s. Find the speed of the particle when it reaches at  x=8 m.

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a

110 m/s

b

84 m/s

c

10 m/s

d

11 m/s

answer is B.

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Detailed Solution

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Area under a versus x gives  v2−u22

⇒v2−(10)22=45

∴v=10 m/s

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