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The velocity of an object at t =0 is ve...

The velocity of an object at t =0 is ` vecv_(0) =- 4 hatj ` m/s . It moves in plane with constant acceleration ` veca = ( 3hati + 8 hatj) m//s^(2)`. What is its velocity after 1 s?

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The correct Answer is:
5 m/s at an angle of ` 53^(@)` x -axis.
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