Physics · 2018
JEE Main · 16 April 2018, Shift 1 · Q3
A body of mass m starts moving from rest along x -axis so that its velocity varies as v= a √ s where a is a constant and s is the distance covered by…
A body of mass m starts moving from rest along $\displaystyle x$-axis so that its velocity varies as $\displaystyle v=\mathrm{a} \sqrt{\mathrm{s}}$ where a is a constant and s is the distance covered by the body. The total work done by all the forces acting on the body in the first t seconds after the start of the motion is :
Official answer
(1)
$\displaystyle \frac{1}{8} \mathrm{ma}^4 \mathrm{t}^2$
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JEE Main 2018 Physics question, with the answer from NTA’s final answer key. Where our answers come from.