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**Chuck pulls his brother in a sled. Chucks brother and the sled have a combined mass of 50kg. On a flat surface, chuck pulls with 120 N 30 degrees above the horizontal. The coefficient of friction btwn the sled and the snow is .08. Find the acceleration of the sled.**

i drew my FBD

but im not sure if assumed wrong for the Fn or the normal force. Any help is greatly appreciated.