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How fast did Newton decide a cannon ball shot out in order to escape Earth’s gravity?
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How fast did Newton decide a cannon ball shot out in order to escape Earth’s gravity?

User MD Naseem Ashraf
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Plugging in for the Earth's mass and for G, we have 11.2 km/s for the escape velocity for an object launched from the Earth's surface. This is about 25,000 miles per hour

User Ariane Breton
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