SaraNextGen Study App [2022-23]
Last Updated On 23-10-2022 - By Sara

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:

(a)

 v2

(b)

(c)

(d)


Question ID - 50291 :-

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:

(a)

 v2

(b)

(c)

(d)

1 Answer
5876 Votes
3537

Answer Key : (b) -

Momentum per second carried by liquid per second is av2

net force due to reflected liquid=2×

net force due to stopped liquid=a

Total force=

Net pressure=



Next Question :

An electromagnetic wave of intensity 50 Wm−2 enters in a medium of refractive index ‘n’ without any loss. The ratio of the magnitudes of electric fields, and the ratio of the magnitudes of the wave before and after entering into the medium are respectively, given by:

(a)

(b)

(c)

(d)


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