In: Physics
You and a friend drag a 28.8 kg fallen tree branch across a level field. You pull with a force of 135.0 N at an angle of 25.0º above the horizontal while a friend’s pull force is parallel to the ground, the kinetic coefficient of friction between the branch and the ground is µk=0.825 and the static coefficient of friction is µs=0.925. The branch starts from rest and is dragged 20.0 m in 15.0 s.