The heart of human has to pump the average adult's 5.9 L of blood via the body every minute. The heart should do work to overcome frictional forces which resist the blood flow. The average blood pressure is 1.3×10^4 N/m^2.
A.) Calculate the work done moving the 5.9 L of blood fully through the body, supposing the blood pressure always takes its average value.
Hint: Whenever the heart contracts, it applies force to the blood. Pressure is just force/area so we can write work = (pressure)(area)(distance). However, (area) (distance) is just the blood volume passing via the heart.
B.) Determine the power output which should the heart have to do this task once a minute?