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A force - time graph for a linear motion...

A force - time graph for a linear motion is shown in the figure where the segments are circular. The linear momentum gained between zero and `8 s` is

A

`-2pi` newton`xx`second

B

Zero newton `xx` second

C

`+4pi` newton` xx`second

D

`-6pi` newton`xx` second

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The correct Answer is:
B
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