Physics

Problem

500\,\text{kg}

satellite moves in a circular orbit of radius

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

with speed

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

. After a brief inward radial thrust, the satellite settles into a new circular orbit of radius

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

. Neglect any external torques during the maneuver. What is the satellite’s speed in its new orbit? a)

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

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

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

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