Final answer:
Without additional information such as air density and static pressure, we cannot calculate the exact pressure at a point on the roof with a wind speed of 60 mph. The pressure can be measured in units such as pascals (Pa), kilopascals (kPa), or pounds per square inch (psi).
Step-by-step explanation:
To determine the pressure at a point on the roof where the air speed is 60 mph, we can use Bernoulli's equation which relates the speed of the fluid to the pressure exerted by that fluid. However, without the necessary additional information such as the air density and the static pressure at that location, we cannot calculate the exact pressure. It's crucial to know that the pressure could be expressed in various units such as pascals (Pa), pounds per square inch (psi), or kilopascals (kPa).
If we had the relevant information, we would calculate the dynamic pressure using the formula for Bernoulli's principle (which assumes laminar flow) and then find the total pressure at the point of interest. Typical units of pressure measurement include pascals where 1 Pa equals 1 N/m², kilopascal (1 kPa = 1000 Pa), or pounds per square inch (psi) in the English system. As an example, atmospheric pressure is often mentioned in millibar (mb), where 100 mb equals 10,000 Pa (1 x 10⁴ Pa).