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A particle of mass 8 kg is initially at ...

A particle of mass 8 kg is initially at rest. A force acts on it whose magnitude changes with time. The force-time graph is shown in the figure.
The velocity of the particle after 10 s is

A

`20 ms^-1`

B

`50 ms^-1`

C

`12.5 ms^-1`

D

`26 ms^-1`

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