Question

The rocket is in free flight along an elliptical trajectory A – A'. The planet has no atmosphere,and its mass is 0.70 times that of the earth. If the rocket has an apogee (apoapsis) and perigee(periapsis) as shown in the figure, determine the speed of the rocket when it is at these two extreme points (in km/sec). Also calculate the time required to complete one revolution (in hour).

Fig: 1

Fig: 2