P=m*(g-a) P=0 m*g-m*a=0
m*g=m*V^2/R R=V^2/g=20^2/10=40 м
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P=m*(g-a) P=0 m*g-m*a=0
m*g=m*V^2/R R=V^2/g=20^2/10=40 м