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Thread: Challenging gravitation question

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    Challenging gravitation question

    Could someone please help me understand this question as it provides no solutions, only the answer, which is B.
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    Re: Challenging gravitation question

    where did you get this?

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    Re: Challenging gravitation question

    Use the law of conservation of energy
    PE (initial) + KE (initial) = PE (final) + KE (final)
    -62.3 * 10^6 m + 1/2 mv^2 = -1.3 * 10^6 m + 0 (assuming the craft stops when it reaches point P then accelerates due to the moons gravity)
    solving for v, we get 11 kms^-1
    2017
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