Earth’s escape velocity is 11 km/s at its surface.  An unknown planet has a mass that is 100 times Earth’s mass and a radius that is 4 times Earth’s radius. Calculate the escape velocity at the surface of an unknown planet.

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Chapter7: Gravitation
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Problem 85A
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Earth’s escape velocity is 11 km/s at its surface. 

An unknown planet has a mass that is 100 times Earth’s mass and a radius that is 4 times Earth’s radius.

Calculate the escape velocity at the surface of an unknown planet.

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