100 pt Consider a single-stage missile equipped with a solid-propellant motor with constant thrust, constant mass flow m, and constant specific impulse Iso = 280 s. The missile total mass is M = 400 kg. its payload ratio i=M/M+M ) = 0.06 and propellant fraction fp = M,/(M,+M,) =0.81, where M,, Mo, and Ms are payload, propellant, and structural masses, respectively. The motor is fired and the missile flies along a straight trajectory, disregard gravity and air drag. The missile experiences the maximum acceleration immediately before bumout, Ag =18 ge=176.52 m/s a) Calculate the distance S, it reaches in t; = 20 sec b) Calculate the distance S, it reaches in t, = 60 sec 100 pt Consider a single-stage missile equipped with a solid-propellant motor with constant thrust, constant mass flow m, and constant specific impulse Iso = 280 s. The missile total mass is M = 400 kg. its payload ratio i=M/M+M ) = 0.06 and propellant fraction fp = M,/(M,+M,) =0.81, where M,, Mo, and Ms are payload, propellant, and structural masses, respectively. The motor is fired and the missile flies along a straight trajectory, disregard gravity and air drag. The missile experiences the maximum acceleration immediately before bumout, Ag =18 ge=176.52 m/s a) Calculate the distance S, it reaches in t; = 20 sec b) Calculate the distance S, it reaches in t, = 60 sec