18 A bullet of mass 10 gram is fixed with speed 19 A solid disc of radius 10 horizontal table rough of 500 m s into a door and

Question

18 A bullet of mass 10 gram is fixed with speed 19 A solid disc of radius 10 horizontal table rough of 500 m s into a door and gets embedded exactly at centre of door The door is 1 m wide and weighs 12 kg Door is hinged along one side and rotates about vertical axis without friction The angular speed of door just after bullet embeds into it is NCERT Pg 180 1 0 35 rad s 1 2 0 625 rad s 1 3 0 255 rad s 1 speed equal to 10 rad kinetic friction between c then time taken by the rolling will be 2 3 T S

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