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PRACA, MOC, ENERGIA MECHANICZNA<br />
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a) b) c)<br />
l l<br />
α<br />
l p<br />
F cp<br />
α<br />
l p<br />
α<br />
F cp<br />
F cp<br />
Rys. 18.8<br />
m ∼ l <br />
m p =<br />
m l<br />
F cp =<br />
F cl<br />
cosα cosα <br />
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cosα = l l<br />
⇒ l p =<br />
l l<br />
l p cosα<br />
cosα = F cp‖<br />
⇒ F cp‖ = F cp cosα<br />
F cp<br />
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F cp‖ =<br />
F cl<br />
cosα cosα = F cl<br />
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