1) [35 pts] An lowa contractor places a ladder on a branch of a tree to trim some branches in November during an ice storm. Just as the ladder is placed on the tree branch, the branch suddenly breaks causing the ladder to fall. Due to the ice storm, the coefficient of friction, µs = µk ~ 0 and the bottom of the ladder can slide freely without any friction. Assume that the ladder has a total length of5 m, a mass of 10 kg, and just after the branch breaks, the angle between the ladder and the ground is 45°, as shown. (a) the angular acceleration of the ladder, a (b) the normal, or reaction, force at the base of the ladder in this case

Fig: 1

Fig: 2

Fig: 3