AMATH 1B Additional Problems 1 week 2 1. The uniform slender bar has an ideal roller at its upper end A. If the coefficient of static friction at B is μ=0.50, determine the minimum angle for which equilibrium is possible. (Ans. 45°). B-0.25, 0.50 2. The automobile has a mass of 2 Mg and center of mass at G. Determine the towing force F required to move the car if the back brakes are locked, and the front wheels are free to roll. Take μ = 0.3. (Ans. 2.76 KN) 3. A stepladder consisting of two legs pinned together at C is resting on a rough floor. Will a 750 N worker be able to change the light bulb if he is re- quired to climb to a height of 1.3 m? The uniform legs AC and BC weigh 100 N and 80 N, respec- tively. The coefficient of static friction at A and B is 0.4. 1.3 m 60 60 -3.2 m 4. Determine the range of weights W for which the 100 N block is in equilibrium. All pulleys and wheels have negligible friction. P,-0.30 M-0.25 100 N 100 20°