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Помогите пожалуйста З одного пункту в інший мотоцикліст рухався зі швидкістю 60 км / год, зворотний шлях їм був пройдений зі швидкістю 10 м / с. Визначте середню швидкість мотоцикліста (в км / год) за весь час руху. С дано и повним розв'язком
Ответы 1
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Дано: V1=60 км/ч; V2=10 м/с=36 км/ч. S1=S2=S. Vcp - ?
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Vcp=весь путь/всё время=
(S1+S2) / (t1+t2)=
2S/(S/V1 + S/V2)=
2/(1/V1 + 1/V2)=
2/(1/60 + 1/36)=
2/(1/12(1/5 + 1/3)=
24/((5+3)/5*3))=
3*15=45 км/ч.
Ответ: 45 км/ч.
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Автор:
monstershannon - 1 год назад
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