Question

2. The escape velocity for an object on the surface of the Earth is given by: 2GM = 1.12 x10 m/s VaR A projectile is launched from the surface of the earth at a velocity of v0.5vm. To what height above the Earth's surface does the projectile rise if air resistance is neglected? 3. A blimp is filled with 200m of helium. How much total weight (cargo plus the weight of the blimp itself) can the blimp carry? (b) If the blimp is now filled with hydrogen, what is the maximum total weight of the blimp if it is to fly? 4. The pressure inside a commercial airliner is maintained at 1 ATM (10 N/m). What is the outward force exerted on a l m x 2 m cabin door if the outside pressure (at 10 km height) is 0.3 ATM

Answer 1

ver=126 mg / kg ) as g = Gm / 22 Vese= VER = R 8/2g 2= V8 => R=(1:125 x1$ /ax 9-8 = 1.25x10€ /18:44 H =159 x10m 6 weight w=fgV s Nue Pued met my m=(Pa-lue) The

m= (1.29-01 179)x200m3 = 1.118200 kg m=222.2kg for Hydrogen, m=(Palu) NH m=(1.29 -0.08)*/m3X200m3 = 242 kg (4) Force is given by F= PxA Fn = 101kPa XA = 108 kN/m2 x (1 x 2 m ² - 202 KN Fout = 6.3x101 kPa ( 122) m2 = 30.3x2 KN = 60.6kN lookPa Flex = (202-60.6kN - 141.44 4140N plet

If there's any doubt feel free to comment, thank u.