Предмет: Физика, автор: ruchkin0139

определить скорость и ускорение движения точки в конце 5 секунды движения если точка движется по закону s=12-6t^2+2t^3-15t

Ответы

Автор ответа: Amigo3

Ответ: скорость ищем как 1 производную от пути по времени v(t)=-12*t+6*t²-15, тогда v(6)=6*12+6*36-15=273 м/с. Ускорение ищем как 1 производную от скорости по времени a(t)=-12+12*t, тогда а(6)=-12+12*6=60 м/с².

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Charles Dickens
(1812-1870)
I was born in Portsmouth, Hampshire, but his family moved to London when he was ten. He later went to work in a factory to pay lor his accommodation and support his family as his father was in prison for not paying his debts. His father’s eventual release and an improvement in the family’s fortunes helped matters, but Dickens never forgave his mother for leaving him in the factory. He first made a name for himself as a writer in his twenties with The Pickwick Papers (1836) .
Oliver Twist (1837-1839) is about a boy born in a workhouse for the poor. Some of the other boys make him ask for more food. As a result. Oliver is then sold. Suffering terrible cruelty, he runs away and joins a young criminal who teaches him how to steal wallets. The general theme of the novel is that of selfishness and dishonesty as most people take advantage of Oliver. Few people show him love and kindness.