# Acar traveling at 30 m/s starts to decelerate steadily. it comes to a complete stop in 12 seconds. what

Acar traveling at 30 m/s starts to decelerate steadily. it comes to a complete stop in 12 seconds. what is its acceleration?

## This Post Has 4 Comments

1. jane078 says:

Just divide -30 m/s (the change in velocity) by 12 seconds (the time required for the car to come to a stop):

-30 m/s
= - 2,5 m / (sec)^2              (answer)
12 sec

2. cschellfamily says:

The acceleration is as following :
a=v/t
=30/6
=5 m/s^2

sumagot ka sarili mo kaya mo yan gooo

Explanation:

para hindi asa sa/p>

4. anthonyfr10004 says:

To calculate the acceleration we use the formula,

$a=\frac{v_{f}-v_{i} }{t}$

Here, $v_{f}$ is the final velocity of the car and $v_{i}$ is the initial velocity of the car and t is time .

Given $v_{i} =30 m/s$ and $t= 9 s$.

The final velocity $v_{f} =0$ , because car comes to stop.

Substituting these values in above formula we get,

$a=\frac{0 m/s-30m/s}{9}$

$a=3.3 m/s^{2}$

Here, acceleration is negative because car is decelerated.