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An object of mass 3 kg is at rest. Now...

An object of mass ` 3 kg ` is at rest. Now a force of ` vec F = 6 t^2 hat i + 4 t hat j` is applied on the object, the velocity of object at `t= 3 s` is.

A

`18hati+3hatj`

B

`18hati+6hatj`

C

`3hati+18hatj`

D

`18hati+4hatj`

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