Physics · 2014
JEE Main · 19 April 2014, Shift 1 · Q2
A bullet looses (1/n)^th of its velocity passing through one plank. The number of such planks that are required to stop the bullet can be:
A bullet looses $\displaystyle \left(\frac{1}{\mathrm{n}}\right)^{\text {th }}$ of its velocity passing through one plank. The number of such planks that are required to stop the bullet can be :
Official answer
(1)
$\displaystyle \frac{\mathrm{n}^2}{2 \mathrm{n}-1}$
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JEE Main 2014 Physics question, with the answer from NTA’s final answer key. Where our answers come from.