4. B The uniform 9-kg ladder rests on the rough floor for which the coefficient of static friction is us = 0.8 and again
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4. B The uniform 9-kg ladder rests on the rough floor for which the coefficient of static friction is us = 0.8 and again
4. B The uniform 9-kg ladder rests on the rough floor for which the coefficient of static friction is us = 0.8 and against the smooth wall at B. Determine the horizontal force P the man must exert on the ladder in order to cause it to move. 1.5 m 2.5 m 1.5 m 2 m
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