Work Energy Power

JEE Main level, single correct, medium

180 of 183

Question 180 of 183

A bullet of mass 10 g10 \mathrm{~g} and speed 500 m/s500 \mathrm{~m} / \mathrm{s} is fired into a door and gets embedded exactly at the centre of the door. The door is 1.0 m1.0 \mathrm{~m} wide and weighs 12 kg12 \mathrm{~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 :

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Answer: (B) 0.625rad/sec0.625 \mathrm{rad} / \mathrm{sec}

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