Your brand new 75.0-kg refrigerator falls out of the back of your truck while you are traveling up a 45.0° incline. It slides 55.0 m to the bottom of the hill and is miraculously unharmed. The coefficient of kinetic friction between the refrigerator and the road is mu k = 0.45 (a) Calculate the work done on the package by friction. (b) Calculate the work done on the package by gravity . (c) Calculate the work done on the package by the normal force. (d) Calculate the net work done on the package.

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