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A particle is projected from point P w...

A particle is projected from point P with velocity `5 sqrt(2)ms^(-1)` prependicular to the surface of a hollow right angle cone whose axis is vertical . It collides at Q normally. The time of the flight of the poarticle is .

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`t = (u)/(g sin theta) = (5 sqrt(2) xx sqrt(2))/(10) = 1 sec`
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