4. A girl is sitting on a tire swing that is attached with a rope that is 2.1 m in length. Her dad pushes her with a speed of 3.0 m/s. If th

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4. A girl is sitting on a tire swing that is attached with a rope that is 2.1 m in length. Her dad pushes her with a speed of 3.0 m/s. If the centripetal force is 88 N, what is the mass of the girl? ​

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Thu Nguyệt 3 months 2021-07-30T17:20:23+00:00 1 Answers 5 views 0

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    0
    2021-07-30T17:22:02+00:00

    The centripetal acceleration is given by
    a
    =
    v
    2
    r
    and Newton’s Second Law says
    F
    =
    m
    a
    , so
    F
    =
    m
    v
    2
    r
    . Rearranging,
    m
    =
    F
    r
    v
    2
    =
    88

    2.1
    2.5
    2

    29.6

    k
    g
    .

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