Question

Zeke's car had an initial velocity os 12 m/sec slows down to 2 m/sec in 4.5 seconds. What is the acceleration of Zeke's car? *

Answer 1

`a=-2.22m/s^2`

Step-by-step explanation:

the information we have is:

initial velocity:
`v_(i)=12m/s`

final velocity:
`v_(f)=2m/s`

and the time:
`t=4.5s`

We need to find the acceleration of the car.

For this we use formula to calculate the acceleration given the information we were given:

`a=(v_(f)-v_(i))/(t)`

acceleration is equal to the difference between the final velocity and the initial velocity divided by time.

We substitute all the known values:

`a=(2m/s-12m/s)/(4.5s)\\ \\a=(-10m/s)/(4.5s)\\ \\a=-2.22m/s^2`

the acceleration is
`-2.22m/s^2`

the result is negative because the car is slowing down.