An object of mass 3 kg is at rest. Now a force $\mathrm{F}=6{\mathrm{t}}^2\widehat{\mathrm{i}}+2\mathrm{t}\widehat{\mathrm{j}}$ N is applied on the object. Find the velocity of the object at t = 3 sec.

• A

  $18\overrightarrow{\mathrm{i}}+3\overrightarrow{\mathrm{j}}$

• B

  $18\overrightarrow{\mathrm{i}}-3\overrightarrow{\mathrm{j}}$

• C

  $3\overrightarrow{\mathrm{i}}-18\overrightarrow{\mathrm{j}}$

• D

  $3\overrightarrow{\mathrm{i}}+18\overrightarrow{\mathrm{j}}$