Help me with this please?

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1 Answer

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    Lv 7
    4 months ago

    Looks like you have two separate problems smashed together

    (a)

    m = k / r³

    m = 1 when r = 2

    1 = k / (2)³

    k = 8

    m = 8 / r³

    m = 8 / (4)³

    m = 1/8

    (b)

    125 = 8 / r³

    r³ = 8/125

    r = 0.4

    ...Second Problem (Assuming it begins with the word "Light")

    v = k / √d

    3 = k / √(2.25)

    k = 3√(2.25) = 4.5

    v = 4.5 / √d

    v = 4.5 / √(2.26)

    v = 2.99

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