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physics unit 5 help

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    can anyone help me with these two questions
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    the answer is D but i dont understand why it cant be B as Momentum = mass x velocity and since mass is constant velocity increases

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    just tell me which formula do i use
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    Top one.
    just look at the formula in the back and look for the ones you know the value of (T)
    1/2m<c>^2 = 3/2KT

    Where K is a constant

    Second one, answer is B. As time period is constant. Therefore frequency is also constant.
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    (Original post by Harry.93)
    Top one.
    just look at the formula in the back and look for the ones you know the value of (T)
    1/2m<c>^2 = 3/2KT

    Where K is a constant

    Second one, answer is B. As time period is constant. Therefore frequency is also constant.
    thanks

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