what is escape velocity
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Escape velocity is the speed that an object needs to be traveling to break free of a planet or moon's gravity well and leave it without further propulsion. For example, a spacecraft leaving the surface of Earth needs to be going 7 miles per second, or nearly 25,000 miles per hour to leave without falling back to the surface or falling into orbit.
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Escape velocity is the minimum velocity that a body must attain to escape the gravitational field of the earth. Suppose if we throw a ball,it will fall back.
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