F=2 H s=2 м A=?
Fтр=-F
A=-F*s*cosα (cosα=1)
A=-F*s=2*2=-4 Дж
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F=2 H s=2 м A=?
Fтр=-F
A=-F*s*cosα (cosα=1)
A=-F*s=2*2=-4 Дж
=========================