5-6. A spacecraft is to escape from the surface of the Earth with a V. = 10,280 m/s and to be parallel to the Earth's orbital velocity at the time of escape and launch is to be at perigee. (a) Find the launch (injection) velocity with an Oberth escape. (b) Find the angle between the Earth's orbital velocity and the perigee position vector for r = ∞; for r = rsol. (c) Sketch the escape trajectory, showing its relationship to the Earth's orbital velocity.

5-6. A spacecraft is to escape from the surface of the Earth with a V. = 10,280 m/s and to be parallel to the Earth's orbital velocity at the time of escape and launch is to be at perigee. (a) Find the launch (injection) velocity with an Oberth escape. (b) Find the angle between the Earth's orbital velocity and the perigee position vector for r = ∞; for r = rsol. (c) Sketch the escape trajectory, showing its relationship to the Earth's orbital velocity.