Вопрос школьника по предмету Физика
Визначте силу натягу троса при рівноприскореному опусканні в кабіні ліфту масою 400 кг, якщо за 10 с вона пройшла відстань 30 м.
Помогите с физикой сроочнооо даю много баллов
Ответ учителя по предмету Физика
Ответ:
Дано
m=400кг
t=10 c
S=30м
F-?
Решение
F=m(g-a)
S=a*t^2/2 ===>a=2S/t^2=2*30/100=0,6 м/с2
F=400(9,8-0,6)=3680 H=3,68 кН
Ответ :F=3,68 кН
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