6. An alien spaceeraft wishes to visit Earth, but in order to do so it must first escape its homeplanet D'Qar. D'Qar has a mass 3 x 1024 kg and radius 7 x 10° m.(a) Write down an equation for total mechanical energy E of an object in a circular orbitaround a planetary body, and use it to derive an equation for the escape velocity of thealien 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 velocitygreater than the escape velocity. What type of orbit will the spacecraft follow?

The velocity of an object refers to its rate of change of position as a vector quantity. escape…

. An alien spacecraft wishes to visit Earth, but in order to do so it must first escape its hom planet D'Qar. D'Qar has a mass 3 x 1024 kg and radius 7 x 10° m. (a) Write down an equation for total mechanical energy E of an object in a circular orb around a planetary body, and use it to derive an equation for the escape velocity of th 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 velocit

. An alien spacecraft wishes to visit Earth, but in order to do so it must first escape its hom planet D'Qar. D'Qar has a mass 3 x 1024 kg and radius 7 x 10° m. (a) Write down an equation for total mechanical energy E of an object in a circular orb around a planetary body, and use it to derive an equation for the escape velocity of th 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 velocit