Предмет: Физика, автор: sonaraspopina

Вантаж масою 40кг розташований на похилій площині з кутом нахилу 450. З яким прискоренням він ковзає донизу, якщо коефіцієнт тертя дорівнює 0,2?
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Ответы

Автор ответа: plohotnukandrey2
0

Ответ:

Дано:. Розв'язання:

m=40 кг. a=F/m. a=0,2•40•10-

α=45°. F=μFт-Fтр. -0,2•40•10•0,71/40=

μ=0,2. Fт=mg. =0,5865(м/с2)

Знайти:. Fтр=μN

a - ? N=mg•sinα. Fтр=μmg•sinα

F=μmg-μmg•sinα

a=μmg-μmg•sinα/m

a=кг•м/с²-кг•м/с²/кг=м/с²

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