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Mechanical Properties of Fluids — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsMechanical Properties of Fluids2 Marks
Question
Explain why The blood pressure in humans is greater at the feet than at the brain.
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Answer

Blood pressure is the pressure exerted by the column of blood on the blood vessel. Blood pressure depends on the force at which heart pumps the blood. The pressure of Liquid is given by: P = hdg where h = height of liquid column(blood in this case) d = density of the liquid g = Acceleration due to gravity. Hence we can say that height of blood column at feet is more than it is at brain and also at the feet the blood has to be pumped to the heart against the force of gravity and has to travel a greater distance than at the brain. so we can conclude, by saying that "The blood pressure in humans is greater at the feet than at the brain".

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