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Physics - NLM Question with Solution | TestHub

PhysicsNLMMiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

A liquid of density $ρ$ is coming out of a hose pipe of radius a with horizontal speed $v$ and hits a mesh. $50 %$ of the liquid passes through the mesh unaffected. $25 %$ looses all of its momentum and $25 %$ comes back with the same speed. The resultant pressure on the mesh will be:

Options:

Answer:

Solution:

Mass per unit time $= ρ A v$

Force due to momentum loss $= \frac{1}{4} ρ A v \times v$

Force due to bounce back $= \frac{1}{4} ρ A v \times 2 v$

Pressure $= \frac{\frac{ρ A v^{2}}{4} + \frac{ρ A v^{2}}{2}}{A} = \frac{3}{4} ρ v^{2}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:NLMSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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