mg*sin(α)-Mg*sin(α) < =Mg*cos(α)*μ+mg*cos(α)*μ
*****************************************************
(M-m)*sin(α) < =(M+m)*cos(α)*μ
(m-M)*sin(α) < =(M+m)*cos(α)*μ
*****************************************************
(M-m)*tg(α) < =(M+m)*μ
(m-M)*tg(α) < =(M+m)*μ
*****************************************************
M*(tg(α)-μ) < =m*(μ+tg(α))
m*(tg(α)-μ) < =M*(μ+tg(α))
*****************************************************
M*(1-0,2) < =m*(0,2+1)
m*(1-0,2) < =M*(0,2+1)
*****************************************************
M*0,8 < =m*1,2
m*0,8 < =M*1,2
*****************************************************
M*2/3 < =m
m < =M*1,5
*****************************************************
M*2/3 < = m < = M*1,5