An 82 kg couch is being pushed with a force of 56N at an angle of 40 degrees above horizontal. If the coefficient of friction between the couch and the floor is 0.051, what is the acceleration of the couch? Be sure to include free body diagrams in your response. How would the result be different if the force were applied at an angle of 40 degrees below horizontal? Explain your reasoning qualitatively, do not do any calculations.

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