The package of mass M = 5 kg is released from rest at A which is h = 3 m above B.  It slides down the frictionless plane which is inclined at an angle θ = 30o onto the rough surface having a coefficient of kinetic friction μK = 0.2.  Neglect the size of the package. Considering only the motion along the incline, what will happen to the change in kinetic energy of the block if friction is present?

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The package of mass M = 5 kg is released from rest at A which is = 3 m above B.  It slides down the frictionless plane which is inclined at an angle θ = 30o onto the rough surface having a coefficient of kinetic friction μK = 0.2.  Neglect the size of the package. Considering only the motion along the incline, what will happen to the change in kinetic energy of the block if friction is present?

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