AP A student, crazed by final exams, uses a force P of magnitude P and angle 0 to push a block of mass m across the ceiling of his room, as in the figure. If the coeffcient of kinetic friction between the block and the ceiling is µk, what is the magnitude of the block's acceleration? NOTE: Express your answer in terms of the given variables, and g. |ā|

AP A student, crazed by final exams, uses a force P of magnitude P and angle 0 to push a block of mass m across the ceiling of his room, as in the figure. If the coeffcient of kinetic friction between the block and the ceiling is µk, what is the magnitude of the block's acceleration? NOTE: Express your answer in terms of the given variables, and g. |ā|