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Kay [80]
3 years ago
6

Dois carros, a e b, móveis se em uma estrada retilínea com volocidade constante,vª =20m/s e v=18 m/s , respectivamente. O carro

A ,está, inicialmente, 500m atrás do carro B . Quanto tempo o carro A levará para alcançar o carro B
Physics
1 answer:
aalyn [17]3 years ago
6 0

Answer:

t = 250 s = 4.167 s

Explanation:

Carro A

x = x₀+v*t

⇒  x = 0 + 20*t  

⇒  x = 20*t   <em>(i)</em>

Carro B

x = x₀+v*t

⇒  x = 500 + 18*t    <em>(ii)</em>

Se as equações são as mesmas, verifica-se  <em>(i) = (ii)</em>

20*t = 500 + 18*t

⇒  20*t - 18*t = 500

⇒  2*t = 500

⇒  t = 250 s = 4.167 s

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