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Physics

Mechanics

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Question

$straight A space thin space uniform space rod space of space mass space straight m space and space length space l space is space kept space on space straight a space smooth space horizontal space surface space such space that space it space can space move space freely. space At space what space distance space from space centre space of space rod space should space straight a space particle space of space mass space straight m space strike space on the space rod space such space that space the space point space straight P space at space straight a space distance italic space l italic divided by italic 3 space from space the space end space of space the space rod space is space instantaneously space at space rest space just space after space the space elastic space collision ? space$

$\frac{1}{2}$
$\frac{1}{3}$
$\frac{1}{6}$
$\frac{1}{4}$

The correct answer is: $1 half$

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PhysicsMechanics

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In a rectangle ABCD, AB =21 and BC=1. Axes $x x$ and $y y$ pass through centre of the rectangle . The moment of inertia is least about :

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PhysicsMechanics

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