A driver of a car hits its brakes and begins to decelerate. If the velocity changes from 60 m / s to 20/m in 6 s, what is the deceleration of the car?

Answer: - 6.67 m/s²

Explanation:

Given that,

Initial velocity of car (Vi) = 60 m/s

Final velocity of car (Vf) = 20 m/s

Time taken (T) = 6 seconds

Deceleration (A) = ?

Deceleration is the rate of change of velocity per unit time as the car prepares to rest (slows down)

i. e Deceleration = (Vf - Vi) / T

A = (20 m/s - 60km/s) / 6 seconds

A = - 40 m/s / 6 seconds

A = - 6.67 m/s² (The negative sign indicates that the car is slowing down)

Thus, the deceleration of the car is - 6.67m/s²