Question

A Car traveling at 16 m/s starts to decelerate steadily. It comes to a complete stop in 8 seconds, what is its acceleration?

Answer 1

VI Initial velocity: 16 m/s

VF Final velocity: 0 m/s

t: 8s  

Acceleration/A is unknown

vf = Vi+a*t  

0 = 16 + a * 8

0-16 = 16-16 + a * 8

-16= a 8 or 8a = -16

8a/8 = -16/8

=-2 m/s

The acceleration is -2m/s (decelerates)

Answer 2

Answer:

The acceleration is -2m/s (decelerates)

Step-by-step explanation:

VI Initial velocity: 16 m/s

VF Final velocity: 0 m/s

t: 8s  

Acceleration/A is unknown

vf = Vi+a*t  

0 = 16 + a * 8

0-16 = 16-16 + a * 8

-16= a 8 or 8a = -16

8a/8 = -16/8

=-2 m/s

The acceleration is -2m/s (decelerates)