题目内容
346.4N
对物体A、B进行受力分析有:
对物体A:T-GA =" 0" ,
解得:T = GA=" 400N " (4分)
对物体B:Tcos30°- f = 0,
解得:f = Tcos30°= 200N =" 346.4N" (4分)
说明:结果根号保留不扣分, f = 346N也对.
对物体A:T-GA =" 0" ,
解得:T = GA=" 400N " (4分)
对物体B:Tcos30°- f = 0,
解得:f = Tcos30°= 200N =" 346.4N" (4分)
说明:结果根号保留不扣分, f = 346N也对.
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