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範例:靜力平衡與張力

一柔軟鐵鏈,懸吊於二牆之間,鏈重WA點切線與牆夾角37oB點切線與牆夾角53oC點為最低點,則(A)A點之張力為4W/5 (B)B點之張力為3W/5 (C)C點之張力為W (D)C點之張力最大 (E)各點張力之水平分量相同[83北聯]

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