1. The problem statement, all variables and given/known data What is the magnitude of the horizontal A uniform 7.1 m tall aluminum ladder is leaing against a frictionless vertical wall. The ladder has a weight of 227 N. The ladder slips when it makes a 52.0◦ angle with the horizontal ﬂoor. Determine the coeﬃcient of static friction between the ladder and the ﬂoor 2. Relevant equations sum of torquest ET=0 and newtons second EF=ma 3. The attempt at a solution We did a problem like this in class today but we didnt take the coefficient of friction into account im not sure where to start with this.... I have drawn a diagram.... and since It slips at 52 degrees i believe that is kinetic friction.... rather than the static friction coefficient which i am trying to find out. If i go thought the sum of torques equation i find out that the force force of friction in the x direction should equal the normal force as the ladder pushes against the wall... could some one please help me understand this concept a little better?