define escape velocity derive an expression for the escape velocity of an object from the surface of earth
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In physics, escape velocity is the minimum speed needed for an object to escapefrom the gravitational influence of a massive body. The escape velocity from Earthis about 11.186 km/s (6.951 mi/s; 40,270 km/h; 25,020 mph) at the surface. ... Speeds higher than escape velocity have a positive speed at infinity.
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