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Imagine that the asteroid A that has an escape velocity of 50m/s. If asteroid B has twice the mass and twice the radius it would have an escape velocity _______ the escape velocity of asteroid A

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4 answers
  1. Hint:
    Escape velocity
    =√(2GM/r)
    G=gravitational constant
    M=mass
    r=radius

    When mass is doubled, replace M by 2M, similarly for r.

    For further reading, see for example:
    http://en.wikipedia.org/wiki/Escape_velocity

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  2. 25

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  3. the same

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  4. half

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