A:(a) A=m/l(↓)B=m/l(↑) (b) A=0 B=P (↑) (C) A=P/2(↑)B=P/2(↑)
B:(a) A=m/l(↑)B=m/l(↑) (b) A= P (↑) B=0 (C) A=P/2(↓)B=P/2(↑)
C:(a) A=m/l(↓)B=m/l(↓) (b) A=0 B=P (↑) (C) A=P/2(↑)B=P/2(↑)
D:(a) A=m/l(↓)B=m/l(↑) (b) A=0 B=P (↑) (C) A=P/2(↓)B=P/2(↑)
B:(a) A=m/l(↑)B=m/l(↑) (b) A= P (↑) B=0 (C) A=P/2(↓)B=P/2(↑)
C:(a) A=m/l(↓)B=m/l(↓) (b) A=0 B=P (↑) (C) A=P/2(↑)B=P/2(↑)
D:(a) A=m/l(↓)B=m/l(↑) (b) A=0 B=P (↑) (C) A=P/2(↓)B=P/2(↑)
正确答案
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