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A dog sled weighing 750 lb is pulled over level snow at a uniform speed by a dog team exerting a force of 60 lb. Find the coefficient of friction.

  • physic -

    The friction force Ff = 60 lb equals the pulling force, since it is not accelerating.

    The coefficient of kinetic friction is
    (pulling force)/(weight) = 60lb/750lb
    = 0.080 (a dimensionless number)

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