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Gravitation — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsGravitation2 Marks
Question
Define Escape velocity and find its value.
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Answer

The velocity with which a body is escaped vertically upwards and it just cross the gravitational field is called escape velocity of the body. Its value is, $\text{V}_\text{e}=\sqrt{2\text{gR}_\text{e}}=11.2\text{km/ s}$

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