A body of mass 1 kg begins to move under the
action of a time dependent force
``\vec{F}`` = ( ``2 t \hat{i}`` + ``3t^2`` ``\hat{j}`` ) N
where `` \hat{i}`` and ``\hat{j}`` are unit vectors along x and y axis.
What power will be developed by the force at the
time t ?
(1) (``2t^2 + 3t^3``)W
(2) (``2t^2 + 4t^4``)W
(3) (``2t^3 + 3t^4``)W
(4) (``2t^3 + 3t^5``)W