Physics · 2020
JEE Main · 4 September 2020, Shift 2 · Q3
A person pushes a box on a rough horizontal plateform surface. He applies a force of 200 N over a distance of 15 m. Thereafter, he gets progressively…
A person pushes a box on a rough horizontal plateform surface. He applies a force of $\displaystyle 200$ N over a distance of $\displaystyle 15$ m . Thereafter, he gets progressively tired and his applied force reduces linearly with distance to $\displaystyle 100$ N . The total distance through which the box has been moved is $\displaystyle 30$ m. What is the work done by the person during the total movement of the box ?
Official answer
(4)
$\displaystyle 5250$ J
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JEE Main 2020 Physics question, with the answer from NTA’s final answer key. Where our answers come from.