Exercício de fisica para engenheiros e cientistas
Exercício:
54. Dois carros viajam ao longo de uma estrada reta . O carro à mantém uma rapidez constante de 80km / h e o carro B mantém uma rapidez constante de 110 km / h . Em T=0,o carro B esta 45 km atras do carro A.
A) Quanto mais viajará o carro A até ser ultrapassado pelo carro B?
B)Quanto à frente do carro A estará o carro B 30s após tê-lo ultrapassado?
55. Um carro, viajando com uma rapidez constante de 20 m / s, passa por um cruzamento no tempo t = 0 . Um segundo carro , viajando com uma rapidez de 30 m/ s no mesmo sentido, passa pelo mesmo cruzamento 5,0 s apos.
A) Esboce as funçoes posição x1(t) e x2(t) para os dois carros para o intervalo 0 < ou = T < ou = 20 s .
B)Determine o quando o segundo carro ultrapassara o primeiro.
C) A que distancia do cruzamento os carros estarao quando emparelharem?
D) Onde está o primeiro carro quando o segundo carro passa pelo cruzamento?
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