# 1 [a] To stabilize a tree as in Figure 1[a], cables AB and AC are attached...

###### Question:

1 [a] To stabilize a tree as in Figure 1[a], cables AB and AC are attached to the upper trunk of the tree at the height of 5 m and then are fastened to steel rods anchored in the ground at B and C. If the tension in AB is 5 kN and that the resultant of the forces exerted at A by cables AB and AC lies in the yz plane, determine: Untuk menegakkan pokok seperti dalam Rajah 1a, kabel AB dan AC dikat pada bahagian atas pokok pada ketinggian 5 m dan bahagian bawahnya dipasang pada rod keluli yang dipasak di B dan C. Jika tegangan dalam AB ialah 5 kN dan paduan kedua-dua daya di A bagi kabel AB dan AC berada dalam satah yz, tentukan: (i) The tension in cable AC. Tegangan dalam kabel AC. (ii) The magnitude and direction of the resultant of the two forces. Magnitud dan arah paduan bagi kedua-du a daya. (ii) The resultant moment of the two forces about its root. Momen paduan kedua-dua daya di sekitar pangkal pokok. (50 marksimarkah) 5m Figure 1[a Rajah 1/a

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