2mg(δs+δh)=mg*2δh+mg(δs-δh)+mA*2δh+ma1(δs-δh)+2ma2(δs+δh)
=> 2mg=mg+ma1+2ma2 联立 2mg+mg+ma1=mg*2+mA*2+2ma2 联立 A=a2-a1
=> A=g/5 a1=g/5 a2=2g/5
=> 2mg=mg+ma1+2ma2 联立 2mg+mg+ma1=mg*2+mA*2+2ma2 联立 A=a2-a1
=> A=g/5 a1=g/5 a2=2g/5
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2楼2021-09-04 10:44
2楼2021-09-04 10:44收起回复
