所屬科目：研究所、轉學考(插大)◆應用力學
1. The vehicle in Fig. 1 is to be towed with two ropes. Determine the magnitude of forces Fa and Fa acting on each rope in order to develop a resultant force of 950 N along the positive x axis, when θ= 20° and when e = 50°. [35%]
2. The vehicle in Fig, 2 has a m nass of 1.5 Mig and mass center at G. If the front two springs each have a stiffness of kA = 58 kN/m and the rear tw wo springs each have a stiffness of kB = 65 kN/m. Determine their compression when the car is parked on a 30°incline. Additionally, what friction force FB must be applied to each rear wheel to hold the vehicle in equilibrium? (35%)
3. A 3 Mg four-wheel-drive vehicle in Fig. 3 has a cer enter of ma: f mass at G. Determine the maximum mass of the log that can be towed. The coefficient of static friction between the log and the ground isμs = 0.8, and the coefficient of static friction between the wheels and ground is μs' = 0.4, Assume the vehicle is powerful enough to slip. [30%]
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