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31 October, 07:30

A 34-kg child on an 18-kg swing set swings back and forth through small angles. If the length of the very light supporting cables for the swing is 4.9 m, how long does it take for each complete back-and-forth swing? Assume that the child and swing set are very small compared to the length of the cables.

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  1. 31 October, 10:22
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    4.44s

    Explanation:

    A 34-kg child on an 18-kg swing set swings back and forth through small angles. If the length of the very light supporting cables for the swing is 4.9 m, how long does it take for each complete back-and-forth swing? Assume that the child and swing set are very small compared to the length of the cables

    since the mass of the child and that of the swing is negligible, the masses wont be involved in the calculation

    T=2π√L/g

    g=acceleration due to gravity which is 9.81m/s2

    the length of the supporting cable is 4.9m

    T the period

    period is the time required to make a complete oscillation

    T=2*π√4.9/9.81

    T=2*π*0.706

    T=4.44s

    4.44s
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