A 23.4 kg person climbs up a uniform ladder with negligible mass. The upper end of the ladder rests on a frictionless wall. The bottom of the ladder rests on a floor with a rough surface where the coefficient of static friction is 0.15 . The angle between the horizontal and the ladder is ? . The person wants to climb up the ladder a distance of 0.94 m along the ladder from the ladder’s foot. 23.4 kg 0.94 m 3.6 m ? b µ = 0.15 µ = 0 What is the minimum angle ?min (between the horizontal and the ladder) so that the person can reach a distance of 0.94 m without having the ladder slip? The acceleration of gravity is 9.8 m/s 2 .