An impulse \( J=m v \) at one end of a stationary uniform frictionless rod of mass \( m \) and l...

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An impulse \( J=m v \) at one end of a stationary uniform frictionless rod of mass \( m \) and length \( l \) which is free to rotate
\( \mathrm{P} \) in a gravity-free space. The impact is elastic. Instantaneous

W axis of rotation of the rod will pass through
(1) its centre of mass
(2) the centre of mass of the rod plus ball
(3) the point of impact of the ball on the rod
(4) the point which is at a distance \( 2 l / 3 \) from the striking end
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