Question

Помогите пожалуйста срочно,
1 вариант

Answer 1

Ответ:

Объяснение:

1)

$P = mg - ma to a = g - dfrac{P}{m} = 10-dfrac{650}{70} = 0.71~dfrac{m}{s^2}\S = v_0t+dfrac{at^2}{2} = 0+dfrac{0.71*8^2}{2} = 22.72~m$

2)

$F_{T} = (M+m)a = (150000+20000)*0.2=34000~N=34~kN\F_K = ma = 20000*0.2=4~kN$

3)

$a = g sinalpha = gdfrac{h}{L} = 10*dfrac{0.4}{2} = 2~dfrac{m}{s^2}$