Partindo do repouso,um carro atinge a velocidade de 72km/h em 10s.Qual a aceleração média deste carro,em m²/s?

A)a = variação de velocidade / variação de tempo = 20/10 = 2 m/s^2 b) S = So + Vo. T + at^2 /2 S = at^2/2 S = 2(7^2)/2 S = 49 m.

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