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A spacecraft of mass 2 · 10^3 kg is in a circular orbit of radius R...

A spacecraft of mass 2 · 10^3 kg is in a circular orbit of radius R = 10^4 km around a planet. The speed of the spacecraft on the orbit is 20km/s. Determine the mass of the planet and the energy of the spacecraft. Submit your answer in the following form:

• Give your numerical answer for the mass of the planet.

• Give your numerical answer for the energy of the spacecraft.

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