On an unknown planet with radius 1000km a future astronaut


On an unknown planet with radius 1000km a future astronaut drops a rock from his hand 2m off the ground. The rock takes 2s to reach the ground. Another astronaut uses a cannon to launch a ball parallel to the ground so that it orbits at the surface of the planet in a circular orbit. What speed did the cannon launch the ball?

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Physics: On an unknown planet with radius 1000km a future astronaut
Reference No:- TGS0794412

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