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An object slides down a 2-meter-long ramp that makes an angle of 60 o with the horizontal. The mass of the object is 2 kg,

An object slides down a 2-meter-long ramp that makes an angle of 60 o with the horizontal. The mass of the object is 2 kg, and the coefficient of kinetic friction between the object and the ramp is 0.3. Calculate the work done by the normal force on the object.

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