Вопрос школьника по предмету Физика
при равновесии рычага на его меньшее плечо действует сила 800 н на большее 50н .Длина меньшего плеча 10 см.Определите дляну большего плеча.Определите длину рычага (весом рычага пренебречь)
Ответ учителя по предмету Физика
По правилу рычага: F₁L₁ = F₂L₂ => L₂ = F₁L₁/F₂ = 800*0,1/50 = 1,6 (м)
Длина всего рычага: L = L₁+L₂ = 0,1+1,6 = 1,7 (м)
Ответ: 1,6 м; 1,7 м
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D. London was founded by the Romans in the 1st century AD and called Londinium. There is a common theory that the word “Londinium” comes from the name of a Celtic village. Also, the adjective “lond” meant “wild” in the Celtic language. Perhaps, it characterized the river Thames, on which the city was started. So, most scientists think that London is a “village on the wide river”.
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