Question

A car is traveling down the interstate at 37.1 m/s. The driver sees a cop and quickly slows down. If the driver slows to 29.8 m/s in 3 seconds, what is the acceleration of the car?

Answer 1

Answer:

a = -2.4 ms⁻²

Explanation:

Given data:

Initial velocity of car = 37.1 m/s

Final velocity of car = 29.8 m/s

Time taken to change velocity = 3 sec

Acceleration of car = ?

Solution:

Formula:

a = Vf - V₀ / t

Vf  = Final velocity

V₀ = Initial velocity

a = acceleration

t = time taken to change velocity

Now we will put the values in formula.

a = 29.8 m/s - 37.1 m/s / 3 s

a = -7.3 m/s/ 3s

a = -2.4 ms⁻²

Negative sign show that car is slowing down.