Unformatted text preview: Space Systems Engineering I HW #1 1. What two types of trajectories are considered escape trajectories from Earth? 2. You are spinning a 0.25 kg mass over your head at the end of a 0.5m string. If you let go of the string, the mass will sail off on a tangent at 2 m/s. What is the angular momentum of the spinning mass before release? 3. While flying straight and level in your SR‐71 airplane 24 km above the surface of Earth, you drop your pencil. What acceleration will the pencil have as it falls toward the cockpit floor? 4. A Russian satellite is in Earth orbit with an altitude at perigee of 375 km and an altitude at apogee of 2000 km. a. What is the semimajor axis of the orbit? b. What is the eccentricity? c. If the true anomaly is 175 deg, what is the satellite’s altitude? d. If the true anomaly is 290 deg, is the flight‐path angle positive or negative? Why? 5. Calculate the altitude needed for a circular, geosynchronous orbit (an orbit whose orbital period matches Earth’s rotation rate). ...
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- Spring '11
- Geosynchronous orbit, Earth orbit, Space Systems Engineering, escape trajectories