Вверх:
T - mg - F= 0
T = F + mg
Вниз:
T = mg ; m = T/g = 250/10 = 25кг.
270 = F + 250 ; F = 270 - 250 = 20H.
Вверх:
T - mg - F= 0
T = F + mg
Вниз:
T = mg ; m = T/g = 250/10 = 25кг.
270 = F + 250 ; F = 270 - 250 = 20H.