Physics · 2013
JEE Main · 9 April 2013, Shift 1 · Q6
A bullet of mass 10 g and speed 500 m/s is fired into a door and gets embedded exactly at the centre of the door. The door is 1.0 m wide and weighs…
A bullet of mass $\displaystyle 10$ g and speed $\displaystyle 500$ m/s is fired into a door and gets embedded exactly at the centre of the door. The door is $\displaystyle 1.0$ m wide and weighs $\displaystyle 12$ kg. It is hinged at one end and rotates about a vertical axis practically without friction. The angular speed of the door just after the bullet embeds into it will be :
Official answer
(2)
$\displaystyle 0.625 \mathrm{rad} / \mathrm{sec}$
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JEE Main 2013 Physics question, with the answer from NTA’s final answer key. Where our answers come from.