An automobile moving at 20m/s slows to a stop in 6.5

seconds. Find the acceration of the car.

-3.1 m/s²

Explanation:

Given data

Initial speed (v₀) : 20 m/s Final speed (vf) : 0 m/s (the automobile stops) Elapsed time (t) : 6.5 seconds Acceleration (a) : to be determined

We can determine the acceleration of the automobile using the following kinematic expression.

a = Δv / t

a = vf - v₀ / t

a = (0 m/s - 20 m/s) / 6.5 s

a = - 3.1 m/s²