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The brakes of an automobile are suddenly applied at the instant when its velocity is 20 m/s. If the automobile comes to a stop after 5 seconds, what is its acceleration?

Respuesta :

dexteright02
Data:

Time (t) = 5 seconds
Final Velocity (v) = 0 [as the car comes to rest]
Initial velocity (u) = 20 m/s
Acceleration = ? (Negative because it is braking)

[tex]Acceleration = \frac{v-u}{t} [/tex]
[tex]Acceleration = \frac{0-20}{5} [/tex]
[tex]\boxed{Acceleration = - 4m/s^2}[/tex]




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