# Figuring out time when you have acceleration and distance.

1. Aug 24, 2011

### cneedshelp

How long does it take a car to travel 30.0m if it accelerates at a rate of 2.00m/s^2?
Given
Distance- 30.0m
A-2.00m/s^2

Do I need to find vi?

2. Aug 24, 2011

### 1MileCrash

You must need to assume it is initially at rest, otherwise the problem is incomplete.

3. Aug 24, 2011

### cneedshelp

So now I have
Distance- 30.0m
a-2.00m/s^2
vi-0m/s
So can i now use the d=1/2at^2 formula?
But we're solving for t
making the equation t, taking the square root of 2d/a right?

Last edited: Aug 24, 2011