Asked by Lily
                A student, crazed by final exams, uses a force P of magnitude 80 N to push a 4.0 kg block across the ceiling of his room. If the coefficient of kinetic friction between the block and the ceiling's surface is 0.42, what is the magnitude of the block's acceleration? 
            
            
        Answers
                    Answered by
            lala
            
    40.1 N
    
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