Problem 4: A car body with mass m and pitching inertia I, is attached to the front and rear axles, mr and mr, by suspension spring k, and dampers bs. Each tire has a stiffness kt. The inputs are the road height profiles rf (t) and r,(t) experienced by the front and rear tires. a) Clearly identify all the degrees of freedom and label them clearly on the diagram below. The center of mass is marked with a O. b) Draw and clearly label all relevant free- body diagrams for the system. ks Car body me, I bs ks bs mr mg r.(t) kt kt 'f(t) www c) Write an equation of motion (Newton's 2nd law) for the rotational degree of freedom of the car body only.

Determine the x-y and n-t components of the 39-kip force F acting on the simply-supported beam. F = 39 kips 27' Part 1 17° Find the angle 3. t 135° 35 15' B 39 kips

If the allowable tensile stress of the wires AB and AC is oallow = 250 Mpa, determine the largest load P that can be supported. The diameter of wire AB is 4 mm and that of wire AC is 5 mm.

solve 4 and 5 only

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Write the equation that relates applied stress to local maximum stress.

Describe the Parallel-Axis Theorem for an Area?

QUESTION 2 A shaft rotates at 300 rpm. 1). If it carries a spur gear that delivers 5 hp to a mating gear and the spur gear has the diametrical pitch of 10, pressure angle of 20°, and 80 teeth, determine a). The resultant force exerted on the shaft = Ib 2). If it carries a sprocket that delivers 4 hp to a mating sprocket and the sprocket has the pitch diameter of 6", determine b). The force exerted on the shaft Ib 3). If it carries a "flat-belt pulley" (Note: NOT V-Belt Drive) that delivers 8hp to another flat-belt pulley and the pitch diameter of the pulley is 20", determine C). The force exerted on the shaft: Ib

Figure 3 of 3 D

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