The deceleration of the car was approximately −30 m/s^2.
To calculate the deceleration of the car, you can use the formula:
a= Δv/Δt
where:
a is the acceleration (or deceleration),Δv is the change in velocity,Δt is the change in time.
In this scenario, the car comes to a stop, so the change in velocity (Δv) is the initial velocity (v initial ) of 27 m/s. The change in time (Δt) is given as 0.9 seconds. Substituting these values into the formula: a= 27 m/s/0.9 s
This calculation yields approximately −30 m/s^2, with the negative sign indicating deceleration. Therefore, the deceleration of the car during the crash was approximately −30 m/s^2.