Вопрос школьника по предмету Физика
100 баллов
Площадь острия иголки равна 0,0002 мм2. Какое давление оказывает игла на ткань, если швея нажимает на иглу перпендикулярно поверхности ткани с силой 2,2 Н?
Игла оказывает на ткань давление, равное
…….. ГПа (гигапаскалей).
Ответ учителя по предмету Физика
p=F/S
S=0,0002 мм2=0,00000002м2
р=2,2 Н/0,00000002м2=110000000Па=1100000ГПа
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