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Perfectly Elastic Collision

A particle of...

Question

A particle of mass m is moving with a uniform speed v in x-y plane along a straight line, y = x + k, the angular momentum of the particle about the origin is

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Solution

The correct option is A

$y = m x + c a n d y = x + k \Rightarrow θ = 45^{\circ} a n d c = k ∴ Angular momentum, L = m v m v \times k \times \frac{1}{\sqrt{2}} = \frac{m v k}{\sqrt{2}}$

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