Physics

Problem

A satellite orbits Earth in an ellipse with apogee distance

1.20\times10^{7}\,\text{m}

and perigee distance

8.00\times10^{6}\,\text{m}

(both measured from Earth’s center). At apogee its speed is

5.20\times10^{3}\,\text{m/s}

. What is its speed at perigee? (Take Earth’s gravitational parameter to be

GM=3.99\times10^{14}\,\text{m}^3\!\!/\!\text{s}^2

.) a)

5.2\times10^{3}\,\text{m/s}

1.0\times10^{4}\,\text{m/s}

7.8\times10^{3}\,\text{m/s}

3.5\times10^{3}\,\text{m/s}