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A liquid of density rho flows along a horizontal pipe of uniform cross - section A with a velocity v through a right angled bend as shown in Fig. What force has to be exerted at the bend to hold the pipe in equilibrium ? |
Answer» <html><body><p><<a href="https://interviewquestions.tuteehub.com/tag/p-588962" style="font-weight:bold;" target="_blank" title="Click to know more about P">P</a>></p>Solution :Change in <a href="https://interviewquestions.tuteehub.com/tag/momentum-1100588" style="font-weight:bold;" target="_blank" title="Click to know more about MOMENTUM">MOMENTUM</a> of mass `Deltam` of <a href="https://interviewquestions.tuteehub.com/tag/liquid-1075124" style="font-weight:bold;" target="_blank" title="Click to know more about LIQUID">LIQUID</a> as it passes through the bend <br/> <img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/NAR_NEET_PHY_XI_P2_C05_SLV_014_S01.png" width="80%"/> <br/> `dP=P_(f)-P_(i)=sqrt2d Delta mv` <br/> `F=(dP)/(dt)=(sqrt2)v(dm)/(dt),["as dm "=rho A <a href="https://interviewquestions.tuteehub.com/tag/dl-957543" style="font-weight:bold;" target="_blank" title="Click to know more about DL">DL</a>]` <br/> `F=sqrt2v((rho. AdL))/(dt),["as "dL//dt=v]` <br/> `F=sqrt2rhoA v^(<a href="https://interviewquestions.tuteehub.com/tag/2-283658" style="font-weight:bold;" target="_blank" title="Click to know more about 2">2</a>)`</body></html> | |