- 6 An Alien Spacecraft Wishes To Visit Earth But In Order To Do So It Must First Escape Its Home Planet D Qar D Qar Ha 1 (174.66 KiB) Viewed 38 times
6. An alien spacecraft wishes to visit Earth, but in order to do so it must first escape its home planet D'Qar. D'Qar ha
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6. An alien spacecraft wishes to visit Earth, but in order to do so it must first escape its home planet D'Qar. D'Qar ha
6. An alien spacecraft wishes to visit Earth, but in order to do so it must first escape its home planet D'Qar. D'Qar has a mass 3 x 1024 kg and radius 7 x 106 m. (a) Write down an equation for total mechanical energy E of an object in a circular orbit around a planetary body, and use it to derive an equation for the escape velocity of the alien spacecraft. (b) Calculate the velocity the alien spacecraft needs to obtain to leave its home world. (c) Briefly explain what will happen if the alien spacecraft is launched with a velocity greater than the escape velocity. What type of orbit will the spacecraft follow?
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