88年 - 88 淡江大學轉學考工程力學#56168

科目：轉學考-工程力學 | 年份：88年 | 選擇題數：0 | 申論題數：6

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所屬科目：轉學考-工程力學

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申論題 (6)

1. A 10 kg uniform ladder 25 m long rests against a smooth wall as shown in Fig* L An 80 kg man S climbs up the ladder to a point A,- a distance I＞2.0 m from the bottom of the ladder, before the I ladder slips. What is the coefficient of friction between the ladder and the ground if the angle 1 between the ladder and ground is 60° ? (25%

♦ , 2. Determine the components of the forces acting on each member of the pin-connected frames shown in Fig. 2. (25%)

* ♦ • 3. For the beam shown in Fi g, 3, find (a) the shear force and bending moment at x = 4 ft and x =10 ft 1 (10%)

(b) draw the shear diagram and moment diagram for the beam. (15%) |

4. The state of stress of an element is shown in Fig. 4(a). Use Mohr’s circle to determine the stresses I on planes forming angles of 30 degrees with the x and y axes as shown in Fig‘ 4

(b)