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r=40[m] Szukane: v=?
Rozw. :
Q=Fr Fr - sila odsrodkowa :)
m*g=m*v^2/r //*r
m*g*r=m*v^2 ///m
v^2=g*r //pierwiastek
v=pierwiastek z g*r
v=pierwiastek 10*40
v=pierwiastek 140 [m/s]
v=11,83 [m/s]
Ood. 11,83 [m/s] :)