3.(10 points) The equity in a firm is a residual claim, i.e., equity holders lay claim to all cashflows left over after other financial claim-holders (debt, preferred stock ctc,) have been satisfied. Ifa firm is liquidated, the same principle applies, with equity investors receiving whatever is left over in the firm atter all outstanding debts and other financial claims are paid off. The principle of limited liability, however, protects equity investors in publicly traded firms if the value of the firm is less than the valuc of the outstanding debt, and they cannot lose more than their investment in the firm.

第二題： 設有一皮帶輪傳動機構，主動輪直徑 200 cm 及轉速 1200 rpm，若皮帶的緊邊張力為 800 N，鬆邊張力 為 400 N，請回答下列問題：【未列出計算過程者不予計分】