How much does the acceleration of gravity at this altitude differ from the value at sea level?
1. Section 3.3 states that only at altitudes above 65 does the difference between the geometric and geo potential altitudes exceed I percent. Calculate the exact value of the geometric altitude at which this difference is precisely 1 percent. 2. For the flight of airplanes in the earth’s atmosphere, the variation of the acceleration of gravity with altitude is generally ignored. One of the highest-flying aircraft has been the Lockheed U-2 (see Fig. 5.52) which was designed to cruise at 70,000 ft. How much does the acceleration of gravity at this altitude differ from the value at sea level?