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Posted: **Mon Jul 11, 2022 1:05 pm**

: Ch 14 42 On A Perfect Fall Day You Are Hovering At A Low Altitude In A Hot Air Balloon Accelerated Neither Upward Nor 1 (49.28 KiB) Viewed 45 times

: Ch 14 42 On A Perfect Fall Day You Are Hovering At A Low Altitude In A Hot Air Balloon Accelerated Neither Upward Nor 2 (32.5 KiB) Viewed 45 times

Ch 14:42 On a perfect fall day, you are hovering at a low altitude in a hot-air balloon, accelerated neither upward nor downward. The total weight of the balloon, including its load and the hot air in it, is 12000 N. What is the volume of the displaced air in units of m³? (Use 1.2 for the density of air) kg m³ HINT: Use g = a mass in kg. 10 to convert the weight of the ballon in N to
Ch 14:43 Consider an airplane with a total wing surface of 100 square meters (m²). At a certain speed the difference in the air pressure below and above the wings is 5% of atmospheric pressure. What is the lift force on the airplane in units of kN (kilo Newtons)? Use 100 = 100 kPa for the atmospheric pressure. kN m²