Change the chapter
Question
When a person sits erect, increasing the vertical position of their brain by 36.0 cm, the heart must continue to pump blood to the brain at the same rate. (a) What is the gain in gravitational potential energy for 100 mL of blood raised 36.0 cm? (b) What is the drop in pressure, neglecting any losses due to friction? (c) Discuss how the gain in gravitational potential energy and the decrease in pressure are related.
1. $0.370 \textrm{ J}$
2. $-3700 \textrm{ Pa}$
3. The gain in potential energy is the work done by the force from the heart. $\Delta (PE) = \Delta P A h$
Solution Video