Early test flights for the space shuttle used a "glider" (mass of 960 {rm kg} including pilot). After a horizontal launch at 460 {rm km/h} at a height of 3800 {rm m}, the glider eventually landed at a speed of 220 {rm km/h}. What would its landing speed have been in the absence of air resistance? What was the average force of air resistance exerted on it if it came in at a constant glide angle of 10{rm ^circ} to the Earth's surface?