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A child pulls a wagon by the handle along a flat sidewalk. She exerts a force of 80.0 N at an angle of 30.0 above the horizontal while she moves the wagon 12 m forward. The force of friction on the wagon is 34 N.

Calculate the mechanical work done by the child on the wagon

Calculate the total work done on the wagon

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3 answers
  1. asd

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  2. Force/F= 80N
    Angle=30 degrees
    Distance/deltad=12m
    Friction Force/Ff=34N

    (a) W = Fcos(30)d
    W = (80N)(cos30)(12m)
    W = 831.38J

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  3. W = 831.38J
    Ff = 34N
    deltad = 12m

    (b) W + (Ff x 12m)
    = W + (-34N x 12m)
    = 831.38J + (-408)
    = 831.38J - 408
    = 423.38J

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