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Physics · 2026

JEE Main · 4 April 2026, Shift 1 · Q49

A body of mass 2 kg begins to move under the influence of time dependent force F =(2 t i +6 t^2 j ) N, where i and j are unit vectors along x and y…

A body of mass $\displaystyle 2$ kg begins to move under the influence of time dependent force $\displaystyle \vec{F}=\left(2 t \hat{i}+6 t^2 \hat{j}\right) N$, where $\displaystyle \hat{i}$ and $\displaystyle \hat{j}$ are unit vectors along $\displaystyle x$ and $\displaystyle y$-axis respectively. The power produced by the force at $\displaystyle t=2 \mathrm{~s}$ is $\displaystyle \_\_\_\_$ W.
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JEE Main 2026 Physics question, with the answer from NTA’s final answer key. Where our answers come from.