contestada

A car starts from rest with an acceleration of 2.84 m/s2 at the instant when a second car moving with a velocity of 25.7 m/s passes it in a parallel line. How far does the first car move before it overtakes the second car?

Respuesta :

boffeemadrid

Answer:

464.69 m

Explanation:

First car

[tex]s=ut+\frac{1}{2}at^2\\\Rightarrow s=0\times t+\frac{1}{2}2.84t^2\\\Rightarrow s=1.42t^2[/tex]

Second car

Distance = Speed × Time

[tex]\text{Distance}=25.7t[/tex]

Here, the time taken and the distance traveled will be the same

Equating the two equations

[tex]1.42t^2=25.7t\\\Rightarrow t=\frac{25.7}{1.42}\\\Rightarrow t=18.09\ s[/tex]

So, the first would have to move [tex]1.42t^2=1.42\times 18.09^2=464.69\ m[/tex] in order to overtake the second car.

Otras preguntas