Question

    What is the escape velocity from the surface of the

    Earth?
    A 7.9 km/s Correct Answer Incorrect Answer
    B 9.8 km/s Correct Answer Incorrect Answer
    C 11.2 km/s Correct Answer Incorrect Answer
    D 3.6 km/s Correct Answer Incorrect Answer

    Solution

    Escape velocity ve = √2gR, where g = 9.8 m/s² and R = 6400 km. Calculating this gives approximately 11.2 km/s. This is the minimum speed needed for an object to escape Earth’s gravitational field without further propulsion.

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