Предмет: Физика, автор: SEVA2820031

Какую силу необходимо приложить чтобы груз массой 150 г, равномерно поднять по наклонной плоскости высотой 20 см длиной 60см.

Ответы

Автор ответа: Saadeerica

из закона сохранения энергии:
Ек=Еп
$frac{mv ^{2} }{2}=mgh$
$v= sqrt{2gh}=4$ м/c
Из прямоугольного треугольника:
S= $sqrt{H} ^{2} - L^{2} =0,6$ м
t= $frac{S}{v} =0,15с<br /><strong>Из закона сохранения импульса:<br /></strong>[tex]mv=Ft$
$F= frac{mv}{t} =4$ Н

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there.

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, we try to make it up at once.

3. I __________

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