Force on a particle moving in straight line is given by $\vec{F} = 6 t^{2} \hat{i} - 3 t \hat{j}$ and velocity is $\vec{v} = 3 t \hat{i} + 6 t \hat{j}$ . Find power at t = 2.

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alok kumar singh

Contributor-Level 10

$P = \vec{F} \cdot \vec{v}$

= 18t⁴ – 18t²

->P (t = 2) =18 [16 − 4] = 216 W

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