December 2018 1 12 Report
PILNE!!!!!!!!!!!
Potrzebuje przekształcić ten wzór:
mg2r +  \frac{mv_{A} ^{2} }{2} = mgr +  \frac{mv_{B}^{2} }{2}

aby otrzymać  v_{A}

Wzór końcowy musi wyjść:  v_{A } =  \sqrt{ v_{B} ^{2} - 2gr }
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