Because of the application of force \( \vec{F}=4 \hat{i}-5 \hat{j} \) newton, the velocity of a ....

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Because of the application of force \( \vec{F}=4 \hat{i}-5 \hat{j} \)
\( \mathrm{P} \)
newton, the velocity of a body at any instant is given
W
by \( \vec{v}=2 \hat{i}-7 \hat{j} \mathrm{~ms}^{-1} \). The instantaneous power is
(1) \( 27 \mathrm{~W} \)
(2) \( 43 \mathrm{~W} \)
(3) \( 21.5 \mathrm{~W} \)
(4) Zero


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