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An automobile traveling along a straight road increases its speed from 67 ft/s to 85 ft/s in 180 ft. If the acceleration is constant, how much time elapses while the auto moves the 180 ft? Answer in units of s.

Respuesta :

medicicowrider

Answer:

t=2.5s

Explanation:

You are given:

Initial speed Vi

Final Speed Vf

Distance travelled d

You must find time elapsed t

Use the kinematic equation that has most of these variables, in this case:

[tex]d = \frac{vi + vf}{2} \times t[/tex]

Substitute in:

[tex]180 = \frac{67 + 85}{2} \times t[/tex]

[tex]t = 2.5s[/tex]