P- 50 kg Figure 2 Summary: Dry Friction Figure 2 shows a 50-kg block sitting on a rough surface with a coefficient of static friction of s. When a 200 N force is applied to a weightless rod pinned at the block's center of gravity it can be direct at any angle above the horizontal. As the lever is moved from a high angle down towards horizontal it remains stationary until it reaches 0 = 30, at which point the block just starts to slide to the right. Given this information: (a) Calculate the value of us. NOTE: You must include a FBD to receive full credit [15 points]