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 a

Question

Rasek [7]

3 years ago

13

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 a

fter 5 seconds, what is its acceleration?

Physics

1 answer:

Gre4nikov [31] · Answer 1 · 2022-10-06T14:12:13+03:00

Gre4nikov [31]3 years ago

3 0

Data:

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

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