A space vehicle is in a circular orbit at an altitude of
Chapter 13, Problem 13.110(choose chapter or problem)
A space vehicle is in a circular orbit at an altitude of 225 mi above the earth. To return to earth, it decreases its speed as it passes through A by firing its engine for a short interval of time in a direction opposite to the direction of its motion. Knowing that the velocity of the space vehicle should form an angle \(\mathrm{f}_{B}=60^{\circ}\) with the vertical as it reaches point B at an altitude of 40 mi, determine (a) the required speed of the vehicle as it leaves its circular orbit at A, (b) its speed at point B.
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