I=21 A L=0.4 м B=1.2 Тл s=0.25 м α=90 A=?
A=F*s*sinα=I*B*L*s*sin90=21*1.2*0.4*0.25*1=2.52 Дж
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I=21 A L=0.4 м B=1.2 Тл s=0.25 м α=90 A=?
A=F*s*sinα=I*B*L*s*sin90=21*1.2*0.4*0.25*1=2.52 Дж
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