(a) the speed vb of the slider as it passes position B and

【已刪除】1. A rigid horizontal bar is supported by a hinge al A and by two steel cables BD and CE, which are of equal length L = 0.8 m，cross-sectional area A = 140 mm2, and E ~ 200 GPa. Please calculate the stress in each cable due to a force of 40 kN, applied as shown in Figure I. (20%)

【已刪除】2. Please determine the reactions RAx，RAy, RBy，REy and Rf y of the cantilever structure as shown in Figure 2. (20%)

【已刪除】3. Please draw the shear and moment diagrams for the beam sliown in Figure 3. (20%)

【已刪除】4. The 200-kg glider B is being towed by airplane A, which is flying horizontally with a constant speed of 220 km/h. The low cable has a length r = 60 m and may be assumed to form a straight line. The glider is gaining altitude and when θ reaches 15°, the angle is increasing at the constant rate θ•=5 deg/s. At the same time the tension in the tow cable is 1520 N for this position. Please calculate the aerodynamic lift L and drag D acting on the glider. (20%)

(b) the maximum deflection δ of the spring. (20%)

【已刪除】(1) Solve (lie following tiifi'emilial equation 

【已刪除】(2) Lixpand in a Fourier series the llmction  skelclieJ in Fig. 1.

(3) Given two pointsx1 andx2 on the x axis, aiid an arc length / ＞ f x2-x1,ind the shape of the curve of lenglh / joining Ihe giving points which, with the x axis, incloses the largest area.

【已刪除】(4) Find the characleristic vibration frequencies for the system of masses and spring shown in Fig. 2,

【已刪除】(5) Evaluate