Problem 2 When the human body is accelerated vertically, blood pressure in the brain will drop. Determine the maximum vertical acceleration that a human can withstand before losing consciousness, Assume a typical systolic pressure of 16 kPa and that the base of the brain is 20 cm above the top of the heart.[consider blood density = 1035 kg/m ] Problem 2 When the human body is accelerated vertically, blood pressure in the brain will drop. Determine the maximum vertical acceleration that a human can withstand before losing consciousness. Assume a typical systolic pressure of 16 kPa and that the base of the brain is 20 cm above the top of the heart.[consider blood density = 1035 kg/m3 ]