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An 8.00kg package in a mail-sorting room slides 2.00 m down a chute that is inclined at 53.0 degrees below the horizontal. The coefficient of kinetic friction between the package and the chute's surface is 0.400.Calculate the work done on the package by friction. Calculate the work done on the package by gravity.

  • physics -

    The work done by gravity is
    M g * (decrease in elevation)
    = M g 2.00 sin 53

    The work done by friction is
    -(friction foirce)(distance moved)
    -M g cos 53 (0.4)* 2.00
    It is negative because work is done against friction

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