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英语翻译Two rods AC and CE are connected by a pin at C and by a

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英语翻译
Two rods AC and CE are connected by a pin at C and by a spring AE.The constant of the spring is 300 N/m,and the spring is unstretched when 角度=30°.Knowing that
l = 0.25m and neglecting the weight of the rods,determine the value of 角度 corresponding to equilibrium when P = 200N.
英语翻译Two rods AC and CE are connected by a pin at C and by a
有两根杆,分别为AC和CE,在C点通过销子连接,并与弹簧AE连接.弹簧常量为300牛/米,当角度为30度时,弹簧无拉伸(相当于不受力).已知I=0.25m,忽略杆的重量,当P=200牛时,确定相应的角度为多少.
这是应用题啊.