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Physics - Fluid Question with Solution | TestHub

PhysicsFluidBernoulli's theorem and applicationsHard2 minQB

PhysicsHardmultiple choice

A block of mass M, at rest on a frictionless surface, contains a curved channel. The channel is designed so that when a horizontal jet of fluid is aimed at it, the fluid is redirected 90 and shoots straight up and out of the top of the block. The flow of the jet is $Q kg / s$ and has a velocity $vm / s$ . Assuming no gravity and ignoring any viscous effects. [Density of fluid is $ρ$ ]

Options:(select one or more)

Answer:

B, C

Solution:

The jet leaves the block with the block's horizontal velocity (relative velocity is vertical).

Conservation of horizontal momentum: $Qt \cdot ν = (M + Qt) ν_{b}$

$ν_{b} = ν \frac{Qt}{Qt + M}$ - (B) correct, (A) incorrect

At $t = 0$ : $ν_{b} = 0$ , so power delivered $P = F ν_{b} = 0$ - (C) correct, (D) incorrect

Stream:JEESubject:PhysicsTopic:FluidSubtopic:Bernoulli's theorem and applications

⏱ 2mℹ️ Source: QB

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