<span>P = m(g-a)/s</span><span>P = 0 => g-a = 0 => g=a</span><span>a= 1/R * V2</span><span>g = 1/R * V2</span><span>V = sqrt( gR )</span>
590ньютонов
примерно
Движение без начальной скорости => s=at^2/2
a=2s/t^2=40*2/100=0.8м/с2
Vк=at=0.8*10=8м/с