Question:
A body starts from rest on a long inclined plane of slope $45^{\circ}$. The coefficient of friction between the body and the plane varies as $\mu=0.3 x$, where $x$ is distance travelled down the plane. The body will have maximum speed (for $g=10 \mathrm{~m} / \mathrm{s}^{2}$ ) when $x=\quad$
$9.8 \mathrm{~m}$
$27 \mathrm{~m}$
$12 \mathrm{~m}$
$3.33 \mathrm{~m}$
Question of from chapter.
JEE Main Previous Year April 22, 2013
Correct Option: 4
Solution:
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