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Physics

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A father racing his son has one-third the kinetic energy of the son, who has two-fifths the mass of the father. The father speeds up by 2.5 m/s and then has the same kinetic energy as the son.

  • Physics -

    Sam,

    By reposting 4 times (plus the original) in a matter of minutes, you are not helping the system.

    Either someone has to spend the time deleting your duplicate posts instead of making a response (which is the present case), or all physics tutors have to spend time reading the same post over 5 times, thus reducing the time spent on responding.

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